Table 1.

Parameter definition and estimation of modified SEIR dynamic model in COVID-19 epidemic of Wuhan in China

Parameter	Definitions	Estimated Value	Range of value	Data Source
β	Probability of infection by symptomatic infections	0.45	0.19-0.65	7, 26–28
β'	Probability of infection by asymptomatic infections	0.30	2/3*β	9, 24
p	Proportion of asymptomatic infections	0.16	0.15-0.20	25
ω	Reciprocal of incubation period of symptomatic cases	0.17	0.14-0.33	9
ω'	Reciprocal of incubation period of asymptomatic cases	0.25	0.14-0.33	25
γ	Reciprocal of infectious period of symptomatic cases	0.05	0.05-0.09	29,30
γ'	Reciprocal of infectious period of asymptomatic cases	0.10	0.10-0.17	29
θ	Case fatality rate	0.06	–	Epidemic data