LitCovid-sentences  

PMC:7269710 / 21152-27677 JSONTXT 10 Projects

Annnotations TAB TSV DIC JSON TextAE

Id Subject Object Predicate Lexical cue
T203 0-10 Sentence denotes Discussion
T204 11-88 Sentence denotes We report three clusters showing local transmission of COVID-19 in Singapore.
T205 89-262 Sentence denotes The three clusters involved a Chinese tour group, company conference, and a church and show the transmissibility of COVID-19 in community settings beyond household clusters.
T206 263-499 Sentence denotes A household cluster was previously reported in Shenzhen, Guangdong, China.12 These findings have implications for public-health measures and outbreak investigations that other countries might consider to detect and contain transmission.
T207 500-632 Sentence denotes The first indication of human-to-human transmission in Singapore was detected 11 days after confirmation of the first imported case.
T208 633-746 Sentence denotes China imposed a lockdown of Wuhan on Jan 23, 2020, and suspended all outgoing tour groups beginning Jan 27, 2020.
T209 747-926 Sentence denotes Despite these measures, local clusters were subsequently identified in Singapore, with probable links to travellers from China before the measures to curb travel were implemented.
T210 927-1086 Sentence denotes Although the primary case or cases in all three clusters cannot be conclusively identified, they are postulated to be tourists or business visitors from China.
T211 1087-1398 Sentence denotes The tour group implicated in cluster A originated from Guangxi at a time when relatively few cases had been reported in that region of China.13 Temperature screening for inbound travellers on flights from Wuhan was implemented in Singapore on Jan 3, 2020, and expanded to all flights from China on Jan 22, 2020.
T212 1399-1564 Sentence denotes Nonetheless, it is unlikely that these primary cases could be identified by temperature screening, because there was no indication that they were febrile on arrival.
T213 1565-1827 Sentence denotes Therefore, it is important that countries, particularly those with a high travel volume from China, enhance their surveillance system to identify local cases, not merely among people with a travel history to China because cases could be present in the community.
T214 1828-2092 Sentence denotes The local cases in cluster C were identified through enhanced pneumonia surveillance of people who had no history of travel to China, whereas the initial cases in cluster A were identified because of heightened suspicion by health-care workers, leading to testing.
T215 2093-2415 Sentence denotes Among the first 84 confirmed cases in Singapore, ten were detected by enhanced pneumonia surveillance and testing of patients in intensive care units, and another eight affected individuals were detected based on doctors' discretion to test patients whom they viewed with suspicion for clinical or epidemiological reasons.
T216 2416-2629 Sentence denotes Such surveillance systems are, therefore, important to identify cases in the community who would be missed if the focus were only on travellers, and they have enabled prompt investigation and containment measures.
T217 2630-2892 Sentence denotes Furthermore, with swift response in contact tracing and quarantine of close contacts, two close contacts developed symptoms and were confirmed to be infected with SARS-CoV-2 during their period of quarantine, ensuring no further onward transmission of the virus.
T218 2893-3214 Sentence denotes Only two of 425 close contacts identified by contact tracing developed COVID-19 (ie, most cases identified in the clusters did not transmit the SARS-CoV-2 virus to their close contacts), raising the hypothesis that a few spreading events can result in clusters of transmission, whereas for most cases, transmission ended.
T219 3215-3276 Sentence denotes The ease of international travel makes containment difficult.
T220 3277-3530 Sentence denotes Cluster B was identified because of sharing of case data in Malaysia through the IHR focal point, and Singapore shared information on attendees at the company conference to respective IHR focal points where participants at the conference had originated.
T221 3531-3729 Sentence denotes This work led to early identification of cases globally and highlights the importance of international cooperation and sharing of information under IHR to aid in active case-finding and containment.
T222 3730-3837 Sentence denotes The cases of COVID-19 in these three clusters are probably attributable to close or prolonged interactions.
T223 3838-3952 Sentence denotes Direct physical contact was reported between shop assistants and tourists at the health products shop (cluster A).
T224 3953-4230 Sentence denotes Handshaking and physical contact during team-building activities and sharing of meals were reported among participants of the business meeting (cluster B).14 Therefore, direct transmission could be possible by contact or indirect transmission (eg, via fomites and shared food).
T225 4231-4482 Sentence denotes We have shown environmental contamination of common-touch surfaces in the isolation room of a confirmed case.15 This finding highlights the importance of emphasising personal and hand hygiene as a key public-health message that countries should adopt.
T226 4483-4562 Sentence denotes Recall bias could affect the accuracy of symptom-onset dates reported by cases.
T227 4563-4744 Sentence denotes In cluster A, the date of onset of symptoms for AC2 was uncertain because the individual only sought primary-care treatment on Jan 30, 2020, 7 days after reported onset of symptoms.
T228 4745-4775 Sentence denotes Other exposures are plausible.
T229 4776-5041 Sentence denotes AC2 reported having symptoms on the day of the tour group's arrival, and we could postulate that AC2 acquired infection from other tourists before Jan 23, 2020, and seeded infections among colleagues, the tour guide, and the two people from Guangxi on Jan 23, 2020.
T230 5042-5169 Sentence denotes However, case AJ1 had no interactions with AC2, unless AC2 acquired infection serendipitously at a similar time, independently.
T231 5170-5396 Sentence denotes Similarly, in cluster C, C1 did not report symptoms until 5 days and C2 until 3 days, after attending church, and this difference could be attributable to recall bias of symptom-onset dates, particularly if symptoms were mild.
T232 5397-5553 Sentence denotes Other study limitations include the small sample size used to ascertain the incubation period, because primary cases could not be identified with certainty.
T233 5554-5703 Sentence denotes Moreover, symptom-onset dates and the movement of and exposure history of cases detected overseas were either based on media reports or were unknown.
T234 5704-6045 Sentence denotes Based on symptom-onset dates of 17 local cases, the median incubation period (4 days) corroborates other published findings.16, 17 Although there is interest on asymptomatic transmission, we are unable to address this point in our study, and further studies should be done to better understand disease transmissibility of asymptomatic cases.
T235 6046-6403 Sentence denotes In conclusion, as importation and local transmission could have occurred in other countries before the lockdown of Wuhan and institution of travel restrictions by China, local clusters outside China can be expected and efforts should be focused on surveillance for locally acquired cases and containment efforts to prevent widespread community transmission.
T236 6404-6525 Sentence denotes It is important for countries to do active case-finding among close contacts of cases to prevent clusters from spreading.