Table 2.

Estimated incubation period and serial interval of confirmed COVID-19 patients in Shijiazhuang

Characteristic	Estimated incubation period (days)		Estimated serial interval (days)
	Mean (95%CI)	Parameters of Weibull distribution (shape, scale)	Mean (0.025th,0.975th)	Parameters of gamma distribution (shape, rate)
All	11.6 (10.6, 12.7)	2.75, 13.07	6.6 (0.6, 20.0)	1.63, 0.25
Immediately confirmed cases	10.6 (9.5, 11.7)	2.82, 11.89	5.1 (0.5, 15.0)	1.76, 0.34
Later becoming symptomatic cases	15.8 (13.7, 17.8)	4.35, 17.29	10.4 (1.7, 26.6)	2.50, 0.24