We used contact tracing to document how COVID-19 was transmitted across 5 generations involving 10 cases, starting with an individual who became ill on January 27. We calculated the incubation period of the cases as the interval between infection and development of symptoms. The median incubation period was 6.0?days (interquartile range, 3.5-9.5?days). The last two generations were infected in public places, 3 and 4?days prior to the onset of illness in their infectors. Both had certain underlying conditions and comorbidity. Further identification of how individuals transmit prior to being symptomatic will have important consequences.? 2020 The Authors. Influenza and Other Respiratory Viruses published by John Wiley & Sons Ltd.
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机译：我们使用联系跟踪来记录Covid-19如何在5代涉及10个案件的一代人传播的，从1月27日开始生病的人。我们计算了病例的潜伏期，作为感染与症状的疾病之间的间隔。中位潜伏期为6.0？天（四分位数范围，3.5-9.5？天）。过去两代被感染在公共场所，3和4日？在其感染者发作前的天。两者都有一定的潜在条件和合并症。进一步识别个人在症状之前传输的情况如何具有重要的后果。 2020作者。 John Wiley＆Sons Ltd.出版的流感和其他呼吸病毒
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