More than 65 % of COVID-19 deaths had been recorded in Hubei , China before February 24 , 2020 .
Over 55 % of all deaths have occurred in Hubei province , where Wuhan is located ; before 24 February , the proportion was over 95 % .The basic reproduction number ( ) of the virus has been estimated to be between 1.4 and 3.9 .
Severe acute respiratory syndrome coronavirus 2