Epidemiology and transmission of COVID-19 in 391 cases and 1286 of their close contacts in Shenzhen, China: a retrospective cohort study
Bi Q,
Wu Y,
Mei S,
叶辰飞,
Zou X,
Zhang Z,
Liu X,
Wei L,
Truelove SA,
Zhang T,
Gao W,
Cheng C,
Tang X,
Wu X,
Wu Yu,
Sun B,
Huang S,
Sun Y,
Zhang J,
Ma T,
Lessler J,
Feng T