Conclusion
The mean incubation period was estimated at 6.24 days 95% CI [5.80;6.69], that fits well in the range of the recommended periods by international health institutions. The COVID-19 situation is evolving daily and there is a global need to ascertain an accurate definition of the incubation period in order to better define cases and duration of isolation measures including quarantine. Discrepancies among sources may hamper case detection and the effectiveness of infection control measures. Following this report, an online real-time analysis is now provided on a website (InCovid-Lyon) [7].