PMC:7011107 / 3730-5330
Annnotations
{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7011107","sourcedb":"PMC","sourceid":"7011107","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7011107","text":"We reviewed the epidemiological characteristics of 2019-nCoV. The estimated reproductive number of 0.3 was obtained from a small number of infected persons with imperfect information in the very early stages of the outbreak [8]; therefore the reproductive number of 2019-nCoV is likely to be similar to that of the 2002/2003 severe acute respiratory syndrome (SARS) coronavirus during the pre-intervention period (range, 2 to 3) and that of the 2009 pandemic A/H1N1 influenza virus in the United States (range, 1.3 to 1.7) [13-15]. The incubation period is likely similar to that of the SARS coronavirus, but with a wider confidence interval (mean, 4.8 days; 95% CI, 4.2 to 5.5) [16]. Furthermore, it is longer than that of the 2009 pandemic A/H1N1 influenza virus (median incubation period, 1.4 days; 95% CI, 1.0 to 1.8) [17]. Therefore, the evidence reviewed above shows that the current control measures for 2019-nCoV, including a quarantine and observation period of 14 days for suspected cases, can be considered appropriate [10]. The generation time and serial interval of 2019-nCoV are longer than those of the 2009 pandemic A/H1N1 influenza virus (median generation time, 2.7 days; 95% CI, 2.0 to 3.5; and mean serial interval: range, 2.6 to 3.2) [14,18]. However, the mean serial interval of 2019-nCoV is similar to that of the SARS coronavirus (mean, 8.4 days; standard deviation, 3.8) [19]. The overall case fatality rate of 2019-nCoV was estimated by international experts to range from 3% to 14% [15,20], and it is more likely to cause infection in older age groups with commodities 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