- Among 391 cases, the median incubation period was estimated to be 4.8 days (95% CI: 4.2-5.4).
- 5% of the cases that develop symptoms were estimated to do so by 1.6 days (95% CI: 1.3-2.0), and 95% by 14.0 days (95% CI: 12.2 – 15.9)


University of Michigan - Ann Arbor

- Wuhan, China
- Beijing, China
- Shenzhen, China
- Germany

COVID-19 Incubation Period Categorized by Geographic Locations 

Bi Q, Wu Y, Mei S et al. Epidemiology and transmission of COVID-19 in 391 cases and 1286 of their close contacts in Shenzhen, China: a retrospective cohort study. The Lancet Infectious Diseases. 2020. doi:10.1016/s1473-3099(20)30287-5

https://www.sciencedirect.com/science/article/pii/S1473309920302875?via%3Dihub

Epidemiology and transmission of COVID-19 in 391 cases and 1286 of their close contacts in Shenzhen, China: a retrospective cohort study

- Travellers from Wuhan, China
- Laboratory-confirmed cases
- Pediatric cases (children)

Populations of COVID-19 Incubation Period in Wuhan, China

Among 262 COVID-19- positive patients brought to a Beijing hospital by Beijing EMS in January and February 2020, the median incubation period was 6.7 days.

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