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    LitCovid-PD-FMA-UBERON

    {"project":"LitCovid-PD-FMA-UBERON","denotations":[{"id":"T5","span":{"begin":2504,"end":2527},"obj":"Body_part"},{"id":"T6","span":{"begin":3030,"end":3046},"obj":"Body_part"},{"id":"T7","span":{"begin":3041,"end":3046},"obj":"Body_part"},{"id":"T8","span":{"begin":3137,"end":3141},"obj":"Body_part"}],"attributes":[{"id":"A5","pred":"fma_id","subj":"T5","obj":"http://purl.org/sig/ont/fma/fma45662"},{"id":"A6","pred":"fma_id","subj":"T6","obj":"http://purl.org/sig/ont/fma/fma66768"},{"id":"A7","pred":"fma_id","subj":"T7","obj":"http://purl.org/sig/ont/fma/fma68646"},{"id":"A8","pred":"fma_id","subj":"T8","obj":"http://purl.org/sig/ont/fma/fma68646"}],"text":"3 Epidemiological characteristics\n\n3.1 Scope of the 2019-nCoV infection outbreak\nSince December 2019, multiple cases occurring unexplainable pneumonia were successively reported in some hospitals in Wuhan city with a history of exposure to a large Hua’nan seafood market in Wuhan city, Hubei province, China. It has been confirmed to be an acute respiratory infection caused by a novel coronavirus. So far, the number of cases without a history of the Hua’nan seafood market exposure is increasing. In addition, clustered cases and confirmed cases without a history of travel to Wuhan emerged. Also, confirmed cases without clear exposure to the Wuhan seafood market have been found in many foreign countries or regions [8].\nAt 24:00 on 26 January 2020, the National Health Commission of the People’s Republic of China has recorded a total of 2744 confirmed cases of pneumonia with 2019-nCoV infection from 30 provinces (districts and cities), including 461 severe cases and 80 deaths. A total of 51 cases have been cured and discharged. At present, 5794 suspected cases were recorded, 32,799 with close contacts to the confirmed patients have been tracked, 583 people were released from medical observation that day, and 30,453 people were still undergoing medical observation. A total of confirmed cases were reported from Hong Kong, Macao and Taiwan of China: 8 cases in Hong Kong, 5 cases in Macao, and 4 cases in Taiwan. In addition, confirmed cases had been reported from abroad: 7 in Thailand, 4 in Australia, 4 in Singapore, 3 in France, 3 in Japan, 3 in Korea, 3 in Malaysia, 3 in the United States, 2 in Vietnam, and one in Nepal [9].\n\n3.2 Host and reservoir\nWild animal, bats [10] is the most possible host of the 2019-nCoV. It requires further confirmation whether pneumonia infected by the 2019-nCoV is transmitted directly from bats or through an intermediate host. It is believed that clarifying the source of the virus will help determine zoonotic transmission patterns [11].\n\n3.3 Route of transmission\nUp to present, the main infection source was the patients who with pneumonia infected by the 2019-nCoV. Respiratory droplet transmission is the main route of transmission, and it can also be transmitted through contact [12]. Although many details, such as the source of the virus and its ability to spread between people remain unknown, an increasing number of cases show the signs of human-to-human transmission [8, 13].\n\n3.4 Etiology and pathogenesis\nThe 2019-nCoV isolated from the lower respiratory tract of patients with unexplainable pneumonia in Wuhan, and it is a novel coronavirus belonging to the β genus. The 2019-nCoV has an envelope; its particles are round or oval, often polymorphic, with a diameter from 60 nm to 140 nm. Its genetic characteristics are significantly different from SARSr-CoV (SARS related coronaviruses) and MERSr-CoV (MERS related coronaviruses). Current research shows it has more than 85% homology with SARSr-CoV (bat-SL-CoVZC45). 2019-nCoV can be found in human respiratory epithelial cells 96 h after in vitro isolation and culture, while it takes about 6 days in VeroE6 or Huh-7 cell lines [12].\nThe source of the virus, the time span of the patients discharging infective virus, and the pathogenesis are still not clear [14].\n\n3.5 Molecular epidemiology\nNo evidence of viral mutation has been found so far [14]. It is necessary to obtain much more clinically isolated viruses with time and geographical variety to assess the extent of the virus mutations, and also whether these mutations indicate adaptability to human hosts [11].\n\n3.6 Incubation and contagious period\nBased on currently epidemiological survey, the latency period is generally from 3 to 7 days, with a maximum of 14 days [10]. Unlike SARSr-CoV, 2019-nCoV is contagious during the latency period [15].\n\n3.7 Prognostic factors\nThe population is generally susceptible to the virus. The elderly and those with underlying diseases show more serious conditions after infection, and children and infants also get infected by the 2019-nCoV. From current knowledge of the cases, most patients have a good prognosis, the symptoms of children are relatively mild, and a few patients are in critical condition. Death cases are more frequently seen in the elderly and those with chronic underlying diseases [12].\nThe newest study including the first 41 confirmed cases admitted to Wuhan between 16 December 2019 and 2 January 2020 showed the median age of patients was 49 years; and the main underlying diseases were diabetes, hypertension, and cardiovascular diseases. Of them, 12 cases experienced acute respiratory distress syndrome (ARDS), 13 cases were admitted to the intensive care unit (ICU), and 6 cases died [16]."}

    LitCovid-PD-UBERON

    {"project":"LitCovid-PD-UBERON","denotations":[{"id":"T4","span":{"begin":2504,"end":2527},"obj":"Body_part"},{"id":"T5","span":{"begin":2510,"end":2527},"obj":"Body_part"}],"attributes":[{"id":"A4","pred":"uberon_id","subj":"T4","obj":"http://purl.obolibrary.org/obo/UBERON_0001558"},{"id":"A5","pred":"uberon_id","subj":"T5","obj":"http://purl.obolibrary.org/obo/UBERON_0000065"}],"text":"3 Epidemiological characteristics\n\n3.1 Scope of the 2019-nCoV infection outbreak\nSince December 2019, multiple cases occurring unexplainable pneumonia were successively reported in some hospitals in Wuhan city with a history of exposure to a large Hua’nan seafood market in Wuhan city, Hubei province, China. It has been confirmed to be an acute respiratory infection caused by a novel coronavirus. So far, the number of cases without a history of the Hua’nan seafood market exposure is increasing. In addition, clustered cases and confirmed cases without a history of travel to Wuhan emerged. Also, confirmed cases without clear exposure to the Wuhan seafood market have been found in many foreign countries or regions [8].\nAt 24:00 on 26 January 2020, the National Health Commission of the People’s Republic of China has recorded a total of 2744 confirmed cases of pneumonia with 2019-nCoV infection from 30 provinces (districts and cities), including 461 severe cases and 80 deaths. A total of 51 cases have been cured and discharged. At present, 5794 suspected cases were recorded, 32,799 with close contacts to the confirmed patients have been tracked, 583 people were released from medical observation that day, and 30,453 people were still undergoing medical observation. A total of confirmed cases were reported from Hong Kong, Macao and Taiwan of China: 8 cases in Hong Kong, 5 cases in Macao, and 4 cases in Taiwan. In addition, confirmed cases had been reported from abroad: 7 in Thailand, 4 in Australia, 4 in Singapore, 3 in France, 3 in Japan, 3 in Korea, 3 in Malaysia, 3 in the United States, 2 in Vietnam, and one in Nepal [9].\n\n3.2 Host and reservoir\nWild animal, bats [10] is the most possible host of the 2019-nCoV. It requires further confirmation whether pneumonia infected by the 2019-nCoV is transmitted directly from bats or through an intermediate host. It is believed that clarifying the source of the virus will help determine zoonotic transmission patterns [11].\n\n3.3 Route of transmission\nUp to present, the main infection source was the patients who with pneumonia infected by the 2019-nCoV. Respiratory droplet transmission is the main route of transmission, and it can also be transmitted through contact [12]. Although many details, such as the source of the virus and its ability to spread between people remain unknown, an increasing number of cases show the signs of human-to-human transmission [8, 13].\n\n3.4 Etiology and pathogenesis\nThe 2019-nCoV isolated from the lower respiratory tract of patients with unexplainable pneumonia in Wuhan, and it is a novel coronavirus belonging to the β genus. The 2019-nCoV has an envelope; its particles are round or oval, often polymorphic, with a diameter from 60 nm to 140 nm. Its genetic characteristics are significantly different from SARSr-CoV (SARS related coronaviruses) and MERSr-CoV (MERS related coronaviruses). Current research shows it has more than 85% homology with SARSr-CoV (bat-SL-CoVZC45). 2019-nCoV can be found in human respiratory epithelial cells 96 h after in vitro isolation and culture, while it takes about 6 days in VeroE6 or Huh-7 cell lines [12].\nThe source of the virus, the time span of the patients discharging infective virus, and the pathogenesis are still not clear [14].\n\n3.5 Molecular epidemiology\nNo evidence of viral mutation has been found so far [14]. It is necessary to obtain much more clinically isolated viruses with time and geographical variety to assess the extent of the virus mutations, and also whether these mutations indicate adaptability to human hosts [11].\n\n3.6 Incubation and contagious period\nBased on currently epidemiological survey, the latency period is generally from 3 to 7 days, with a maximum of 14 days [10]. Unlike SARSr-CoV, 2019-nCoV is contagious during the latency period [15].\n\n3.7 Prognostic factors\nThe population is generally susceptible to the virus. The elderly and those with underlying diseases show more serious conditions after infection, and children and infants also get infected by the 2019-nCoV. From current knowledge of the cases, most patients have a good prognosis, the symptoms of children are relatively mild, and a few patients are in critical condition. Death cases are more frequently seen in the elderly and those with chronic underlying diseases [12].\nThe newest study including the first 41 confirmed cases admitted to Wuhan between 16 December 2019 and 2 January 2020 showed the median age of patients was 49 years; and the main underlying diseases were diabetes, hypertension, and cardiovascular diseases. Of them, 12 cases experienced acute respiratory distress syndrome (ARDS), 13 cases were admitted to the intensive care unit (ICU), and 6 cases died [16]."}

    LitCovid-PD-MONDO

    {"project":"LitCovid-PD-MONDO","denotations":[{"id":"T37","span":{"begin":52,"end":71},"obj":"Disease"},{"id":"T38","span":{"begin":62,"end":71},"obj":"Disease"},{"id":"T39","span":{"begin":141,"end":150},"obj":"Disease"},{"id":"T40","span":{"begin":346,"end":367},"obj":"Disease"},{"id":"T41","span":{"begin":358,"end":367},"obj":"Disease"},{"id":"T42","span":{"begin":867,"end":876},"obj":"Disease"},{"id":"T43","span":{"begin":882,"end":901},"obj":"Disease"},{"id":"T44","span":{"begin":892,"end":901},"obj":"Disease"},{"id":"T45","span":{"begin":1777,"end":1786},"obj":"Disease"},{"id":"T46","span":{"begin":2043,"end":2052},"obj":"Disease"},{"id":"T47","span":{"begin":2086,"end":2095},"obj":"Disease"},{"id":"T48","span":{"begin":2559,"end":2568},"obj":"Disease"},{"id":"T49","span":{"begin":2828,"end":2832},"obj":"Disease"},{"id":"T50","span":{"begin":3988,"end":3997},"obj":"Disease"},{"id":"T51","span":{"begin":4531,"end":4539},"obj":"Disease"},{"id":"T52","span":{"begin":4541,"end":4582},"obj":"Disease"},{"id":"T53","span":{"begin":4541,"end":4553},"obj":"Disease"},{"id":"T54","span":{"begin":4559,"end":4582},"obj":"Disease"},{"id":"T55","span":{"begin":4614,"end":4649},"obj":"Disease"},{"id":"T56","span":{"begin":4620,"end":4649},"obj":"Disease"},{"id":"T57","span":{"begin":4651,"end":4655},"obj":"Disease"}],"attributes":[{"id":"A37","pred":"mondo_id","subj":"T37","obj":"http://purl.obolibrary.org/obo/MONDO_0100096"},{"id":"A38","pred":"mondo_id","subj":"T38","obj":"http://purl.obolibrary.org/obo/MONDO_0005550"},{"id":"A39","pred":"mondo_id","subj":"T39","obj":"http://purl.obolibrary.org/obo/MONDO_0005249"},{"id":"A40","pred":"mondo_id","subj":"T40","obj":"http://purl.obolibrary.org/obo/MONDO_0024355"},{"id":"A41","pred":"mondo_id","subj":"T41","obj":"http://purl.obolibrary.org/obo/MONDO_0005550"},{"id":"A42","pred":"mondo_id","subj":"T42","obj":"http://purl.obolibrary.org/obo/MONDO_0005249"},{"id":"A43","pred":"mondo_id","subj":"T43","obj":"http://purl.obolibrary.org/obo/MONDO_0100096"},{"id":"A44","pred":"mondo_id","subj":"T44","obj":"http://purl.obolibrary.org/obo/MONDO_0005550"},{"id":"A45","pred":"mondo_id","subj":"T45","obj":"http://purl.obolibrary.org/obo/MONDO_0005249"},{"id":"A46","pred":"mondo_id","subj":"T46","obj":"http://purl.obolibrary.org/obo/MONDO_0005550"},{"id":"A47","pred":"mondo_id","subj":"T47","obj":"http://purl.obolibrary.org/obo/MONDO_0005249"},{"id":"A48","pred":"mondo_id","subj":"T48","obj":"http://purl.obolibrary.org/obo/MONDO_0005249"},{"id":"A49","pred":"mondo_id","subj":"T49","obj":"http://purl.obolibrary.org/obo/MONDO_0005091"},{"id":"A50","pred":"mondo_id","subj":"T50","obj":"http://purl.obolibrary.org/obo/MONDO_0005550"},{"id":"A51","pred":"mondo_id","subj":"T51","obj":"http://purl.obolibrary.org/obo/MONDO_0005015"},{"id":"A52","pred":"mondo_id","subj":"T52","obj":"http://purl.obolibrary.org/obo/MONDO_0001302"},{"id":"A53","pred":"mondo_id","subj":"T53","obj":"http://purl.obolibrary.org/obo/MONDO_0005044"},{"id":"A54","pred":"mondo_id","subj":"T54","obj":"http://purl.obolibrary.org/obo/MONDO_0004995"},{"id":"A55","pred":"mondo_id","subj":"T55","obj":"http://purl.obolibrary.org/obo/MONDO_0006502"},{"id":"A56","pred":"mondo_id","subj":"T56","obj":"http://purl.obolibrary.org/obo/MONDO_0009971"},{"id":"A57","pred":"mondo_id","subj":"T57","obj":"http://purl.obolibrary.org/obo/MONDO_0006502"}],"text":"3 Epidemiological characteristics\n\n3.1 Scope of the 2019-nCoV infection outbreak\nSince December 2019, multiple cases occurring unexplainable pneumonia were successively reported in some hospitals in Wuhan city with a history of exposure to a large Hua’nan seafood market in Wuhan city, Hubei province, China. It has been confirmed to be an acute respiratory infection caused by a novel coronavirus. So far, the number of cases without a history of the Hua’nan seafood market exposure is increasing. In addition, clustered cases and confirmed cases without a history of travel to Wuhan emerged. Also, confirmed cases without clear exposure to the Wuhan seafood market have been found in many foreign countries or regions [8].\nAt 24:00 on 26 January 2020, the National Health Commission of the People’s Republic of China has recorded a total of 2744 confirmed cases of pneumonia with 2019-nCoV infection from 30 provinces (districts and cities), including 461 severe cases and 80 deaths. A total of 51 cases have been cured and discharged. At present, 5794 suspected cases were recorded, 32,799 with close contacts to the confirmed patients have been tracked, 583 people were released from medical observation that day, and 30,453 people were still undergoing medical observation. A total of confirmed cases were reported from Hong Kong, Macao and Taiwan of China: 8 cases in Hong Kong, 5 cases in Macao, and 4 cases in Taiwan. In addition, confirmed cases had been reported from abroad: 7 in Thailand, 4 in Australia, 4 in Singapore, 3 in France, 3 in Japan, 3 in Korea, 3 in Malaysia, 3 in the United States, 2 in Vietnam, and one in Nepal [9].\n\n3.2 Host and reservoir\nWild animal, bats [10] is the most possible host of the 2019-nCoV. It requires further confirmation whether pneumonia infected by the 2019-nCoV is transmitted directly from bats or through an intermediate host. It is believed that clarifying the source of the virus will help determine zoonotic transmission patterns [11].\n\n3.3 Route of transmission\nUp to present, the main infection source was the patients who with pneumonia infected by the 2019-nCoV. Respiratory droplet transmission is the main route of transmission, and it can also be transmitted through contact [12]. Although many details, such as the source of the virus and its ability to spread between people remain unknown, an increasing number of cases show the signs of human-to-human transmission [8, 13].\n\n3.4 Etiology and pathogenesis\nThe 2019-nCoV isolated from the lower respiratory tract of patients with unexplainable pneumonia in Wuhan, and it is a novel coronavirus belonging to the β genus. The 2019-nCoV has an envelope; its particles are round or oval, often polymorphic, with a diameter from 60 nm to 140 nm. Its genetic characteristics are significantly different from SARSr-CoV (SARS related coronaviruses) and MERSr-CoV (MERS related coronaviruses). Current research shows it has more than 85% homology with SARSr-CoV (bat-SL-CoVZC45). 2019-nCoV can be found in human respiratory epithelial cells 96 h after in vitro isolation and culture, while it takes about 6 days in VeroE6 or Huh-7 cell lines [12].\nThe source of the virus, the time span of the patients discharging infective virus, and the pathogenesis are still not clear [14].\n\n3.5 Molecular epidemiology\nNo evidence of viral mutation has been found so far [14]. It is necessary to obtain much more clinically isolated viruses with time and geographical variety to assess the extent of the virus mutations, and also whether these mutations indicate adaptability to human hosts [11].\n\n3.6 Incubation and contagious period\nBased on currently epidemiological survey, the latency period is generally from 3 to 7 days, with a maximum of 14 days [10]. Unlike SARSr-CoV, 2019-nCoV is contagious during the latency period [15].\n\n3.7 Prognostic factors\nThe population is generally susceptible to the virus. The elderly and those with underlying diseases show more serious conditions after infection, and children and infants also get infected by the 2019-nCoV. From current knowledge of the cases, most patients have a good prognosis, the symptoms of children are relatively mild, and a few patients are in critical condition. Death cases are more frequently seen in the elderly and those with chronic underlying diseases [12].\nThe newest study including the first 41 confirmed cases admitted to Wuhan between 16 December 2019 and 2 January 2020 showed the median age of patients was 49 years; and the main underlying diseases were diabetes, hypertension, and cardiovascular diseases. Of them, 12 cases experienced acute respiratory distress syndrome (ARDS), 13 cases were admitted to the intensive care unit (ICU), and 6 cases died [16]."}

    LitCovid-PD-CLO

    {"project":"LitCovid-PD-CLO","denotations":[{"id":"T24","span":{"begin":215,"end":216},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T25","span":{"begin":240,"end":241},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T26","span":{"begin":312,"end":315},"obj":"http://purl.obolibrary.org/obo/CLO_0051582"},{"id":"T27","span":{"begin":378,"end":379},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T28","span":{"begin":435,"end":436},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T29","span":{"begin":556,"end":557},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T30","span":{"begin":819,"end":822},"obj":"http://purl.obolibrary.org/obo/CLO_0051582"},{"id":"T31","span":{"begin":832,"end":833},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T32","span":{"begin":986,"end":987},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T33","span":{"begin":1279,"end":1280},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T34","span":{"begin":1674,"end":1680},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_33208"},{"id":"T35","span":{"begin":1682,"end":1686},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_9397"},{"id":"T36","span":{"begin":1842,"end":1846},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_9397"},{"id":"T37","span":{"begin":1929,"end":1934},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_10239"},{"id":"T38","span":{"begin":1987,"end":1989},"obj":"http://purl.obolibrary.org/obo/CLO_0053733"},{"id":"T39","span":{"begin":2293,"end":2298},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_10239"},{"id":"T40","span":{"begin":2404,"end":2409},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_9606"},{"id":"T41","span":{"begin":2413,"end":2418},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_9606"},{"id":"T42","span":{"begin":2433,"end":2438},"obj":"http://purl.obolibrary.org/obo/CLO_0001001"},{"id":"T43","span":{"begin":2504,"end":2527},"obj":"http://purl.obolibrary.org/obo/UBERON_0001558"},{"id":"T44","span":{"begin":2589,"end":2590},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T45","span":{"begin":2649,"end":2652},"obj":"http://purl.obolibrary.org/obo/CLO_0051582"},{"id":"T46","span":{"begin":2723,"end":2724},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T47","span":{"begin":2926,"end":2929},"obj":"http://purl.obolibrary.org/obo/CLO_0051582"},{"id":"T48","span":{"begin":2969,"end":2972},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_9397"},{"id":"T49","span":{"begin":3012,"end":3017},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_9606"},{"id":"T50","span":{"begin":3030,"end":3040},"obj":"http://purl.obolibrary.org/obo/CL_0000066"},{"id":"T51","span":{"begin":3041,"end":3046},"obj":"http://purl.obolibrary.org/obo/GO_0005623"},{"id":"T52","span":{"begin":3131,"end":3141},"obj":"http://purl.obolibrary.org/obo/CLO_0009989"},{"id":"T53","span":{"begin":3172,"end":3177},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_10239"},{"id":"T54","span":{"begin":3231,"end":3236},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_10239"},{"id":"T55","span":{"begin":3343,"end":3346},"obj":"http://purl.obolibrary.org/obo/CLO_0051582"},{"id":"T56","span":{"begin":3427,"end":3434},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_10239"},{"id":"T57","span":{"begin":3498,"end":3503},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_10239"},{"id":"T58","span":{"begin":3573,"end":3578},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_9606"},{"id":"T59","span":{"begin":3586,"end":3588},"obj":"http://purl.obolibrary.org/obo/CLO_0053733"},{"id":"T60","span":{"begin":3727,"end":3728},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T61","span":{"begin":3899,"end":3904},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_10239"},{"id":"T62","span":{"begin":4116,"end":4117},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T63","span":{"begin":4184,"end":4185},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T64","span":{"begin":4364,"end":4366},"obj":"http://purl.obolibrary.org/obo/CLO_0053794"}],"text":"3 Epidemiological characteristics\n\n3.1 Scope of the 2019-nCoV infection outbreak\nSince December 2019, multiple cases occurring unexplainable pneumonia were successively reported in some hospitals in Wuhan city with a history of exposure to a large Hua’nan seafood market in Wuhan city, Hubei province, China. It has been confirmed to be an acute respiratory infection caused by a novel coronavirus. So far, the number of cases without a history of the Hua’nan seafood market exposure is increasing. In addition, clustered cases and confirmed cases without a history of travel to Wuhan emerged. Also, confirmed cases without clear exposure to the Wuhan seafood market have been found in many foreign countries or regions [8].\nAt 24:00 on 26 January 2020, the National Health Commission of the People’s Republic of China has recorded a total of 2744 confirmed cases of pneumonia with 2019-nCoV infection from 30 provinces (districts and cities), including 461 severe cases and 80 deaths. A total of 51 cases have been cured and discharged. At present, 5794 suspected cases were recorded, 32,799 with close contacts to the confirmed patients have been tracked, 583 people were released from medical observation that day, and 30,453 people were still undergoing medical observation. A total of confirmed cases were reported from Hong Kong, Macao and Taiwan of China: 8 cases in Hong Kong, 5 cases in Macao, and 4 cases in Taiwan. In addition, confirmed cases had been reported from abroad: 7 in Thailand, 4 in Australia, 4 in Singapore, 3 in France, 3 in Japan, 3 in Korea, 3 in Malaysia, 3 in the United States, 2 in Vietnam, and one in Nepal [9].\n\n3.2 Host and reservoir\nWild animal, bats [10] is the most possible host of the 2019-nCoV. It requires further confirmation whether pneumonia infected by the 2019-nCoV is transmitted directly from bats or through an intermediate host. It is believed that clarifying the source of the virus will help determine zoonotic transmission patterns [11].\n\n3.3 Route of transmission\nUp to present, the main infection source was the patients who with pneumonia infected by the 2019-nCoV. Respiratory droplet transmission is the main route of transmission, and it can also be transmitted through contact [12]. Although many details, such as the source of the virus and its ability to spread between people remain unknown, an increasing number of cases show the signs of human-to-human transmission [8, 13].\n\n3.4 Etiology and pathogenesis\nThe 2019-nCoV isolated from the lower respiratory tract of patients with unexplainable pneumonia in Wuhan, and it is a novel coronavirus belonging to the β genus. The 2019-nCoV has an envelope; its particles are round or oval, often polymorphic, with a diameter from 60 nm to 140 nm. Its genetic characteristics are significantly different from SARSr-CoV (SARS related coronaviruses) and MERSr-CoV (MERS related coronaviruses). Current research shows it has more than 85% homology with SARSr-CoV (bat-SL-CoVZC45). 2019-nCoV can be found in human respiratory epithelial cells 96 h after in vitro isolation and culture, while it takes about 6 days in VeroE6 or Huh-7 cell lines [12].\nThe source of the virus, the time span of the patients discharging infective virus, and the pathogenesis are still not clear [14].\n\n3.5 Molecular epidemiology\nNo evidence of viral mutation has been found so far [14]. It is necessary to obtain much more clinically isolated viruses with time and geographical variety to assess the extent of the virus mutations, and also whether these mutations indicate adaptability to human hosts [11].\n\n3.6 Incubation and contagious period\nBased on currently epidemiological survey, the latency period is generally from 3 to 7 days, with a maximum of 14 days [10]. Unlike SARSr-CoV, 2019-nCoV is contagious during the latency period [15].\n\n3.7 Prognostic factors\nThe population is generally susceptible to the virus. The elderly and those with underlying diseases show more serious conditions after infection, and children and infants also get infected by the 2019-nCoV. From current knowledge of the cases, most patients have a good prognosis, the symptoms of children are relatively mild, and a few patients are in critical condition. Death cases are more frequently seen in the elderly and those with chronic underlying diseases [12].\nThe newest study including the first 41 confirmed cases admitted to Wuhan between 16 December 2019 and 2 January 2020 showed the median age of patients was 49 years; and the main underlying diseases were diabetes, hypertension, and cardiovascular diseases. Of them, 12 cases experienced acute respiratory distress syndrome (ARDS), 13 cases were admitted to the intensive care unit (ICU), and 6 cases died [16]."}

    LitCovid-PD-CHEBI

    {"project":"LitCovid-PD-CHEBI","denotations":[{"id":"T6","span":{"begin":2973,"end":2975},"obj":"Chemical"}],"attributes":[{"id":"A6","pred":"chebi_id","subj":"T6","obj":"http://purl.obolibrary.org/obo/CHEBI_74815"}],"text":"3 Epidemiological characteristics\n\n3.1 Scope of the 2019-nCoV infection outbreak\nSince December 2019, multiple cases occurring unexplainable pneumonia were successively reported in some hospitals in Wuhan city with a history of exposure to a large Hua’nan seafood market in Wuhan city, Hubei province, China. It has been confirmed to be an acute respiratory infection caused by a novel coronavirus. So far, the number of cases without a history of the Hua’nan seafood market exposure is increasing. In addition, clustered cases and confirmed cases without a history of travel to Wuhan emerged. Also, confirmed cases without clear exposure to the Wuhan seafood market have been found in many foreign countries or regions [8].\nAt 24:00 on 26 January 2020, the National Health Commission of the People’s Republic of China has recorded a total of 2744 confirmed cases of pneumonia with 2019-nCoV infection from 30 provinces (districts and cities), including 461 severe cases and 80 deaths. A total of 51 cases have been cured and discharged. At present, 5794 suspected cases were recorded, 32,799 with close contacts to the confirmed patients have been tracked, 583 people were released from medical observation that day, and 30,453 people were still undergoing medical observation. A total of confirmed cases were reported from Hong Kong, Macao and Taiwan of China: 8 cases in Hong Kong, 5 cases in Macao, and 4 cases in Taiwan. In addition, confirmed cases had been reported from abroad: 7 in Thailand, 4 in Australia, 4 in Singapore, 3 in France, 3 in Japan, 3 in Korea, 3 in Malaysia, 3 in the United States, 2 in Vietnam, and one in Nepal [9].\n\n3.2 Host and reservoir\nWild animal, bats [10] is the most possible host of the 2019-nCoV. It requires further confirmation whether pneumonia infected by the 2019-nCoV is transmitted directly from bats or through an intermediate host. It is believed that clarifying the source of the virus will help determine zoonotic transmission patterns [11].\n\n3.3 Route of transmission\nUp to present, the main infection source was the patients who with pneumonia infected by the 2019-nCoV. Respiratory droplet transmission is the main route of transmission, and it can also be transmitted through contact [12]. Although many details, such as the source of the virus and its ability to spread between people remain unknown, an increasing number of cases show the signs of human-to-human transmission [8, 13].\n\n3.4 Etiology and pathogenesis\nThe 2019-nCoV isolated from the lower respiratory tract of patients with unexplainable pneumonia in Wuhan, and it is a novel coronavirus belonging to the β genus. The 2019-nCoV has an envelope; its particles are round or oval, often polymorphic, with a diameter from 60 nm to 140 nm. Its genetic characteristics are significantly different from SARSr-CoV (SARS related coronaviruses) and MERSr-CoV (MERS related coronaviruses). Current research shows it has more than 85% homology with SARSr-CoV (bat-SL-CoVZC45). 2019-nCoV can be found in human respiratory epithelial cells 96 h after in vitro isolation and culture, while it takes about 6 days in VeroE6 or Huh-7 cell lines [12].\nThe source of the virus, the time span of the patients discharging infective virus, and the pathogenesis are still not clear [14].\n\n3.5 Molecular epidemiology\nNo evidence of viral mutation has been found so far [14]. It is necessary to obtain much more clinically isolated viruses with time and geographical variety to assess the extent of the virus mutations, and also whether these mutations indicate adaptability to human hosts [11].\n\n3.6 Incubation and contagious period\nBased on currently epidemiological survey, the latency period is generally from 3 to 7 days, with a maximum of 14 days [10]. Unlike SARSr-CoV, 2019-nCoV is contagious during the latency period [15].\n\n3.7 Prognostic factors\nThe population is generally susceptible to the virus. The elderly and those with underlying diseases show more serious conditions after infection, and children and infants also get infected by the 2019-nCoV. From current knowledge of the cases, most patients have a good prognosis, the symptoms of children are relatively mild, and a few patients are in critical condition. Death cases are more frequently seen in the elderly and those with chronic underlying diseases [12].\nThe newest study including the first 41 confirmed cases admitted to Wuhan between 16 December 2019 and 2 January 2020 showed the median age of patients was 49 years; and the main underlying diseases were diabetes, hypertension, and cardiovascular diseases. Of them, 12 cases experienced acute respiratory distress syndrome (ARDS), 13 cases were admitted to the intensive care unit (ICU), and 6 cases died [16]."}

    LitCovid-PD-HP

    {"project":"LitCovid-PD-HP","denotations":[{"id":"T7","span":{"begin":141,"end":150},"obj":"Phenotype"},{"id":"T8","span":{"begin":346,"end":367},"obj":"Phenotype"},{"id":"T9","span":{"begin":867,"end":876},"obj":"Phenotype"},{"id":"T10","span":{"begin":1777,"end":1786},"obj":"Phenotype"},{"id":"T11","span":{"begin":2086,"end":2095},"obj":"Phenotype"},{"id":"T12","span":{"begin":2559,"end":2568},"obj":"Phenotype"},{"id":"T13","span":{"begin":4541,"end":4553},"obj":"Phenotype"},{"id":"T14","span":{"begin":4559,"end":4582},"obj":"Phenotype"},{"id":"T15","span":{"begin":4620,"end":4640},"obj":"Phenotype"}],"attributes":[{"id":"A7","pred":"hp_id","subj":"T7","obj":"http://purl.obolibrary.org/obo/HP_0002090"},{"id":"A8","pred":"hp_id","subj":"T8","obj":"http://purl.obolibrary.org/obo/HP_0011947"},{"id":"A9","pred":"hp_id","subj":"T9","obj":"http://purl.obolibrary.org/obo/HP_0002090"},{"id":"A10","pred":"hp_id","subj":"T10","obj":"http://purl.obolibrary.org/obo/HP_0002090"},{"id":"A11","pred":"hp_id","subj":"T11","obj":"http://purl.obolibrary.org/obo/HP_0002090"},{"id":"A12","pred":"hp_id","subj":"T12","obj":"http://purl.obolibrary.org/obo/HP_0002090"},{"id":"A13","pred":"hp_id","subj":"T13","obj":"http://purl.obolibrary.org/obo/HP_0000822"},{"id":"A14","pred":"hp_id","subj":"T14","obj":"http://purl.obolibrary.org/obo/HP_0001626"},{"id":"A15","pred":"hp_id","subj":"T15","obj":"http://purl.obolibrary.org/obo/HP_0002098"}],"text":"3 Epidemiological characteristics\n\n3.1 Scope of the 2019-nCoV infection outbreak\nSince December 2019, multiple cases occurring unexplainable pneumonia were successively reported in some hospitals in Wuhan city with a history of exposure to a large Hua’nan seafood market in Wuhan city, Hubei province, China. It has been confirmed to be an acute respiratory infection caused by a novel coronavirus. So far, the number of cases without a history of the Hua’nan seafood market exposure is increasing. In addition, clustered cases and confirmed cases without a history of travel to Wuhan emerged. Also, confirmed cases without clear exposure to the Wuhan seafood market have been found in many foreign countries or regions [8].\nAt 24:00 on 26 January 2020, the National Health Commission of the People’s Republic of China has recorded a total of 2744 confirmed cases of pneumonia with 2019-nCoV infection from 30 provinces (districts and cities), including 461 severe cases and 80 deaths. A total of 51 cases have been cured and discharged. At present, 5794 suspected cases were recorded, 32,799 with close contacts to the confirmed patients have been tracked, 583 people were released from medical observation that day, and 30,453 people were still undergoing medical observation. A total of confirmed cases were reported from Hong Kong, Macao and Taiwan of China: 8 cases in Hong Kong, 5 cases in Macao, and 4 cases in Taiwan. In addition, confirmed cases had been reported from abroad: 7 in Thailand, 4 in Australia, 4 in Singapore, 3 in France, 3 in Japan, 3 in Korea, 3 in Malaysia, 3 in the United States, 2 in Vietnam, and one in Nepal [9].\n\n3.2 Host and reservoir\nWild animal, bats [10] is the most possible host of the 2019-nCoV. It requires further confirmation whether pneumonia infected by the 2019-nCoV is transmitted directly from bats or through an intermediate host. It is believed that clarifying the source of the virus will help determine zoonotic transmission patterns [11].\n\n3.3 Route of transmission\nUp to present, the main infection source was the patients who with pneumonia infected by the 2019-nCoV. Respiratory droplet transmission is the main route of transmission, and it can also be transmitted through contact [12]. Although many details, such as the source of the virus and its ability to spread between people remain unknown, an increasing number of cases show the signs of human-to-human transmission [8, 13].\n\n3.4 Etiology and pathogenesis\nThe 2019-nCoV isolated from the lower respiratory tract of patients with unexplainable pneumonia in Wuhan, and it is a novel coronavirus belonging to the β genus. The 2019-nCoV has an envelope; its particles are round or oval, often polymorphic, with a diameter from 60 nm to 140 nm. Its genetic characteristics are significantly different from SARSr-CoV (SARS related coronaviruses) and MERSr-CoV (MERS related coronaviruses). Current research shows it has more than 85% homology with SARSr-CoV (bat-SL-CoVZC45). 2019-nCoV can be found in human respiratory epithelial cells 96 h after in vitro isolation and culture, while it takes about 6 days in VeroE6 or Huh-7 cell lines [12].\nThe source of the virus, the time span of the patients discharging infective virus, and the pathogenesis are still not clear [14].\n\n3.5 Molecular epidemiology\nNo evidence of viral mutation has been found so far [14]. It is necessary to obtain much more clinically isolated viruses with time and geographical variety to assess the extent of the virus mutations, and also whether these mutations indicate adaptability to human hosts [11].\n\n3.6 Incubation and contagious period\nBased on currently epidemiological survey, the latency period is generally from 3 to 7 days, with a maximum of 14 days [10]. Unlike SARSr-CoV, 2019-nCoV is contagious during the latency period [15].\n\n3.7 Prognostic factors\nThe population is generally susceptible to the virus. The elderly and those with underlying diseases show more serious conditions after infection, and children and infants also get infected by the 2019-nCoV. From current knowledge of the cases, most patients have a good prognosis, the symptoms of children are relatively mild, and a few patients are in critical condition. Death cases are more frequently seen in the elderly and those with chronic underlying diseases [12].\nThe newest study including the first 41 confirmed cases admitted to Wuhan between 16 December 2019 and 2 January 2020 showed the median age of patients was 49 years; and the main underlying diseases were diabetes, hypertension, and cardiovascular diseases. Of them, 12 cases experienced acute respiratory distress syndrome (ARDS), 13 cases were admitted to the intensive care unit (ICU), and 6 cases died [16]."}

    LitCovid-PD-GO-BP

    {"project":"LitCovid-PD-GO-BP","denotations":[{"id":"T1","span":{"begin":2459,"end":2471},"obj":"http://purl.obolibrary.org/obo/GO_0009405"},{"id":"T2","span":{"begin":3246,"end":3258},"obj":"http://purl.obolibrary.org/obo/GO_0009405"}],"text":"3 Epidemiological characteristics\n\n3.1 Scope of the 2019-nCoV infection outbreak\nSince December 2019, multiple cases occurring unexplainable pneumonia were successively reported in some hospitals in Wuhan city with a history of exposure to a large Hua’nan seafood market in Wuhan city, Hubei province, China. It has been confirmed to be an acute respiratory infection caused by a novel coronavirus. So far, the number of cases without a history of the Hua’nan seafood market exposure is increasing. In addition, clustered cases and confirmed cases without a history of travel to Wuhan emerged. Also, confirmed cases without clear exposure to the Wuhan seafood market have been found in many foreign countries or regions [8].\nAt 24:00 on 26 January 2020, the National Health Commission of the People’s Republic of China has recorded a total of 2744 confirmed cases of pneumonia with 2019-nCoV infection from 30 provinces (districts and cities), including 461 severe cases and 80 deaths. A total of 51 cases have been cured and discharged. At present, 5794 suspected cases were recorded, 32,799 with close contacts to the confirmed patients have been tracked, 583 people were released from medical observation that day, and 30,453 people were still undergoing medical observation. A total of confirmed cases were reported from Hong Kong, Macao and Taiwan of China: 8 cases in Hong Kong, 5 cases in Macao, and 4 cases in Taiwan. In addition, confirmed cases had been reported from abroad: 7 in Thailand, 4 in Australia, 4 in Singapore, 3 in France, 3 in Japan, 3 in Korea, 3 in Malaysia, 3 in the United States, 2 in Vietnam, and one in Nepal [9].\n\n3.2 Host and reservoir\nWild animal, bats [10] is the most possible host of the 2019-nCoV. It requires further confirmation whether pneumonia infected by the 2019-nCoV is transmitted directly from bats or through an intermediate host. It is believed that clarifying the source of the virus will help determine zoonotic transmission patterns [11].\n\n3.3 Route of transmission\nUp to present, the main infection source was the patients who with pneumonia infected by the 2019-nCoV. Respiratory droplet transmission is the main route of transmission, and it can also be transmitted through contact [12]. Although many details, such as the source of the virus and its ability to spread between people remain unknown, an increasing number of cases show the signs of human-to-human transmission [8, 13].\n\n3.4 Etiology and pathogenesis\nThe 2019-nCoV isolated from the lower respiratory tract of patients with unexplainable pneumonia in Wuhan, and it is a novel coronavirus belonging to the β genus. The 2019-nCoV has an envelope; its particles are round or oval, often polymorphic, with a diameter from 60 nm to 140 nm. Its genetic characteristics are significantly different from SARSr-CoV (SARS related coronaviruses) and MERSr-CoV (MERS related coronaviruses). Current research shows it has more than 85% homology with SARSr-CoV (bat-SL-CoVZC45). 2019-nCoV can be found in human respiratory epithelial cells 96 h after in vitro isolation and culture, while it takes about 6 days in VeroE6 or Huh-7 cell lines [12].\nThe source of the virus, the time span of the patients discharging infective virus, and the pathogenesis are still not clear [14].\n\n3.5 Molecular epidemiology\nNo evidence of viral mutation has been found so far [14]. It is necessary to obtain much more clinically isolated viruses with time and geographical variety to assess the extent of the virus mutations, and also whether these mutations indicate adaptability to human hosts [11].\n\n3.6 Incubation and contagious period\nBased on currently epidemiological survey, the latency period is generally from 3 to 7 days, with a maximum of 14 days [10]. Unlike SARSr-CoV, 2019-nCoV is contagious during the latency period [15].\n\n3.7 Prognostic factors\nThe population is generally susceptible to the virus. The elderly and those with underlying diseases show more serious conditions after infection, and children and infants also get infected by the 2019-nCoV. From current knowledge of the cases, most patients have a good prognosis, the symptoms of children are relatively mild, and a few patients are in critical condition. Death cases are more frequently seen in the elderly and those with chronic underlying diseases [12].\nThe newest study including the first 41 confirmed cases admitted to Wuhan between 16 December 2019 and 2 January 2020 showed the median age of patients was 49 years; and the main underlying diseases were diabetes, hypertension, and cardiovascular diseases. Of them, 12 cases experienced acute respiratory distress syndrome (ARDS), 13 cases were admitted to the intensive care unit (ICU), and 6 cases died [16]."}

    LitCovid-sentences

    {"project":"LitCovid-sentences","denotations":[{"id":"T86","span":{"begin":0,"end":33},"obj":"Sentence"},{"id":"T87","span":{"begin":35,"end":80},"obj":"Sentence"},{"id":"T88","span":{"begin":81,"end":308},"obj":"Sentence"},{"id":"T89","span":{"begin":309,"end":398},"obj":"Sentence"},{"id":"T90","span":{"begin":399,"end":498},"obj":"Sentence"},{"id":"T91","span":{"begin":499,"end":593},"obj":"Sentence"},{"id":"T92","span":{"begin":594,"end":724},"obj":"Sentence"},{"id":"T93","span":{"begin":725,"end":985},"obj":"Sentence"},{"id":"T94","span":{"begin":986,"end":1037},"obj":"Sentence"},{"id":"T95","span":{"begin":1038,"end":1278},"obj":"Sentence"},{"id":"T96","span":{"begin":1279,"end":1362},"obj":"Sentence"},{"id":"T97","span":{"begin":1363,"end":1425},"obj":"Sentence"},{"id":"T98","span":{"begin":1426,"end":1485},"obj":"Sentence"},{"id":"T99","span":{"begin":1486,"end":1644},"obj":"Sentence"},{"id":"T100","span":{"begin":1646,"end":1668},"obj":"Sentence"},{"id":"T101","span":{"begin":1669,"end":1735},"obj":"Sentence"},{"id":"T102","span":{"begin":1736,"end":1879},"obj":"Sentence"},{"id":"T103","span":{"begin":1880,"end":1991},"obj":"Sentence"},{"id":"T104","span":{"begin":1993,"end":2018},"obj":"Sentence"},{"id":"T105","span":{"begin":2019,"end":2122},"obj":"Sentence"},{"id":"T106","span":{"begin":2123,"end":2243},"obj":"Sentence"},{"id":"T107","span":{"begin":2244,"end":2440},"obj":"Sentence"},{"id":"T108","span":{"begin":2442,"end":2471},"obj":"Sentence"},{"id":"T109","span":{"begin":2472,"end":2634},"obj":"Sentence"},{"id":"T110","span":{"begin":2635,"end":2755},"obj":"Sentence"},{"id":"T111","span":{"begin":2756,"end":2899},"obj":"Sentence"},{"id":"T112","span":{"begin":2900,"end":2985},"obj":"Sentence"},{"id":"T113","span":{"begin":2986,"end":3153},"obj":"Sentence"},{"id":"T114","span":{"begin":3154,"end":3284},"obj":"Sentence"},{"id":"T115","span":{"begin":3286,"end":3312},"obj":"Sentence"},{"id":"T116","span":{"begin":3313,"end":3370},"obj":"Sentence"},{"id":"T117","span":{"begin":3371,"end":3590},"obj":"Sentence"},{"id":"T118","span":{"begin":3592,"end":3628},"obj":"Sentence"},{"id":"T119","span":{"begin":3629,"end":3753},"obj":"Sentence"},{"id":"T120","span":{"begin":3754,"end":3827},"obj":"Sentence"},{"id":"T121","span":{"begin":3829,"end":3851},"obj":"Sentence"},{"id":"T122","span":{"begin":3852,"end":3905},"obj":"Sentence"},{"id":"T123","span":{"begin":3906,"end":4059},"obj":"Sentence"},{"id":"T124","span":{"begin":4060,"end":4225},"obj":"Sentence"},{"id":"T125","span":{"begin":4226,"end":4326},"obj":"Sentence"},{"id":"T126","span":{"begin":4327,"end":4583},"obj":"Sentence"},{"id":"T127","span":{"begin":4584,"end":4737},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"3 Epidemiological characteristics\n\n3.1 Scope of the 2019-nCoV infection outbreak\nSince December 2019, multiple cases occurring unexplainable pneumonia were successively reported in some hospitals in Wuhan city with a history of exposure to a large Hua’nan seafood market in Wuhan city, Hubei province, China. It has been confirmed to be an acute respiratory infection caused by a novel coronavirus. So far, the number of cases without a history of the Hua’nan seafood market exposure is increasing. In addition, clustered cases and confirmed cases without a history of travel to Wuhan emerged. Also, confirmed cases without clear exposure to the Wuhan seafood market have been found in many foreign countries or regions [8].\nAt 24:00 on 26 January 2020, the National Health Commission of the People’s Republic of China has recorded a total of 2744 confirmed cases of pneumonia with 2019-nCoV infection from 30 provinces (districts and cities), including 461 severe cases and 80 deaths. A total of 51 cases have been cured and discharged. At present, 5794 suspected cases were recorded, 32,799 with close contacts to the confirmed patients have been tracked, 583 people were released from medical observation that day, and 30,453 people were still undergoing medical observation. A total of confirmed cases were reported from Hong Kong, Macao and Taiwan of China: 8 cases in Hong Kong, 5 cases in Macao, and 4 cases in Taiwan. In addition, confirmed cases had been reported from abroad: 7 in Thailand, 4 in Australia, 4 in Singapore, 3 in France, 3 in Japan, 3 in Korea, 3 in Malaysia, 3 in the United States, 2 in Vietnam, and one in Nepal [9].\n\n3.2 Host and reservoir\nWild animal, bats [10] is the most possible host of the 2019-nCoV. It requires further confirmation whether pneumonia infected by the 2019-nCoV is transmitted directly from bats or through an intermediate host. It is believed that clarifying the source of the virus will help determine zoonotic transmission patterns [11].\n\n3.3 Route of transmission\nUp to present, the main infection source was the patients who with pneumonia infected by the 2019-nCoV. Respiratory droplet transmission is the main route of transmission, and it can also be transmitted through contact [12]. Although many details, such as the source of the virus and its ability to spread between people remain unknown, an increasing number of cases show the signs of human-to-human transmission [8, 13].\n\n3.4 Etiology and pathogenesis\nThe 2019-nCoV isolated from the lower respiratory tract of patients with unexplainable pneumonia in Wuhan, and it is a novel coronavirus belonging to the β genus. The 2019-nCoV has an envelope; its particles are round or oval, often polymorphic, with a diameter from 60 nm to 140 nm. Its genetic characteristics are significantly different from SARSr-CoV (SARS related coronaviruses) and MERSr-CoV (MERS related coronaviruses). Current research shows it has more than 85% homology with SARSr-CoV (bat-SL-CoVZC45). 2019-nCoV can be found in human respiratory epithelial cells 96 h after in vitro isolation and culture, while it takes about 6 days in VeroE6 or Huh-7 cell lines [12].\nThe source of the virus, the time span of the patients discharging infective virus, and the pathogenesis are still not clear [14].\n\n3.5 Molecular epidemiology\nNo evidence of viral mutation has been found so far [14]. It is necessary to obtain much more clinically isolated viruses with time and geographical variety to assess the extent of the virus mutations, and also whether these mutations indicate adaptability to human hosts [11].\n\n3.6 Incubation and contagious period\nBased on currently epidemiological survey, the latency period is generally from 3 to 7 days, with a maximum of 14 days [10]. Unlike SARSr-CoV, 2019-nCoV is contagious during the latency period [15].\n\n3.7 Prognostic factors\nThe population is generally susceptible to the virus. The elderly and those with underlying diseases show more serious conditions after infection, and children and infants also get infected by the 2019-nCoV. From current knowledge of the cases, most patients have a good prognosis, the symptoms of children are relatively mild, and a few patients are in critical condition. Death cases are more frequently seen in the elderly and those with chronic underlying diseases [12].\nThe newest study including the first 41 confirmed cases admitted to Wuhan between 16 December 2019 and 2 January 2020 showed the median age of patients was 49 years; and the main underlying diseases were diabetes, hypertension, and cardiovascular diseases. Of them, 12 cases experienced acute respiratory distress syndrome (ARDS), 13 cases were admitted to the intensive care unit (ICU), and 6 cases died [16]."}

    LitCovid-PubTator

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Epidemiological characteristics\n\n3.1 Scope of the 2019-nCoV infection outbreak\nSince December 2019, multiple cases occurring unexplainable pneumonia were successively reported in some hospitals in Wuhan city with a history of exposure to a large Hua’nan seafood market in Wuhan city, Hubei province, China. It has been confirmed to be an acute respiratory infection caused by a novel coronavirus. So far, the number of cases without a history of the Hua’nan seafood market exposure is increasing. In addition, clustered cases and confirmed cases without a history of travel to Wuhan emerged. Also, confirmed cases without clear exposure to the Wuhan seafood market have been found in many foreign countries or regions [8].\nAt 24:00 on 26 January 2020, the National Health Commission of the People’s Republic of China has recorded a total of 2744 confirmed cases of pneumonia with 2019-nCoV infection from 30 provinces (districts and cities), including 461 severe cases and 80 deaths. A total of 51 cases have been cured and discharged. At present, 5794 suspected cases were recorded, 32,799 with close contacts to the confirmed patients have been tracked, 583 people were released from medical observation that day, and 30,453 people were still undergoing medical observation. A total of confirmed cases were reported from Hong Kong, Macao and Taiwan of China: 8 cases in Hong Kong, 5 cases in Macao, and 4 cases in Taiwan. In addition, confirmed cases had been reported from abroad: 7 in Thailand, 4 in Australia, 4 in Singapore, 3 in France, 3 in Japan, 3 in Korea, 3 in Malaysia, 3 in the United States, 2 in Vietnam, and one in Nepal [9].\n\n3.2 Host and reservoir\nWild animal, bats [10] is the most possible host of the 2019-nCoV. It requires further confirmation whether pneumonia infected by the 2019-nCoV is transmitted directly from bats or through an intermediate host. It is believed that clarifying the source of the virus will help determine zoonotic transmission patterns [11].\n\n3.3 Route of transmission\nUp to present, the main infection source was the patients who with pneumonia infected by the 2019-nCoV. Respiratory droplet transmission is the main route of transmission, and it can also be transmitted through contact [12]. Although many details, such as the source of the virus and its ability to spread between people remain unknown, an increasing number of cases show the signs of human-to-human transmission [8, 13].\n\n3.4 Etiology and pathogenesis\nThe 2019-nCoV isolated from the lower respiratory tract of patients with unexplainable pneumonia in Wuhan, and it is a novel coronavirus belonging to the β genus. The 2019-nCoV has an envelope; its particles are round or oval, often polymorphic, with a diameter from 60 nm to 140 nm. Its genetic characteristics are significantly different from SARSr-CoV (SARS related coronaviruses) and MERSr-CoV (MERS related coronaviruses). Current research shows it has more than 85% homology with SARSr-CoV (bat-SL-CoVZC45). 2019-nCoV can be found in human respiratory epithelial cells 96 h after in vitro isolation and culture, while it takes about 6 days in VeroE6 or Huh-7 cell lines [12].\nThe source of the virus, the time span of the patients discharging infective virus, and the pathogenesis are still not clear [14].\n\n3.5 Molecular epidemiology\nNo evidence of viral mutation has been found so far [14]. It is necessary to obtain much more clinically isolated viruses with time and geographical variety to assess the extent of the virus mutations, and also whether these mutations indicate adaptability to human hosts [11].\n\n3.6 Incubation and contagious period\nBased on currently epidemiological survey, the latency period is generally from 3 to 7 days, with a maximum of 14 days [10]. Unlike SARSr-CoV, 2019-nCoV is contagious during the latency period [15].\n\n3.7 Prognostic factors\nThe population is generally susceptible to the virus. The elderly and those with underlying diseases show more serious conditions after infection, and children and infants also get infected by the 2019-nCoV. From current knowledge of the cases, most patients have a good prognosis, the symptoms of children are relatively mild, and a few patients are in critical condition. Death cases are more frequently seen in the elderly and those with chronic underlying diseases [12].\nThe newest study including the first 41 confirmed cases admitted to Wuhan between 16 December 2019 and 2 January 2020 showed the median age of patients was 49 years; and the main underlying diseases were diabetes, hypertension, and cardiovascular diseases. Of them, 12 cases experienced acute respiratory distress syndrome (ARDS), 13 cases were admitted to the intensive care unit (ICU), and 6 cases died [16]."}