An analysis of data on infections from the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), a novel human coronavirus that causes the respiratory illness COVID-19, yielded an estimate of 5.1 days for the median disease incubation period. This median time from exposure to onset of symptoms suggests that the 14-day quarantine period used by the U.S. Centers for Disease Control and Prevention (CDC) for individuals with likely exposure to...
