Fig. 3: Timing of transmission events and SARS-CoV-2 infected subjects in randomly selected clusters showing evidence of pre-symptomatic transmission.

Square symbols indicate symptomatic cases and circular symbols indicate asymptomatic subjects. Age, sex, and generation in a cluster are shown for each SARS-CoV-2 infected individual (left panels), with information on date of illness onset for symptomatic cases and date of the first RT-PCR positive result for asymptomatic subjects and for symptomatic cases without date of illness onset (symbol “*”). Timeline of events (right panels).