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,
Chenfei Ye,
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