Initial estimates of the basic reproduction number ( R0 ) for COVID-19 in January were between 1.4 and 2.5 , but a subsequent analysis has concluded that it may be about 5.7 ( with a 95 % chance of being between 3.8 and 8.9 ) . < gallery mode= '' nolines '' widths= '' 320 '' heights= '' 220 '' >
There is a 95 % probability that the number of transmission from a single Covid-19 case is between 3.8 and 8.9 .