Figure 5.
Summary statistics of the transmission chains: chain sizes, generations, secondary cases arising from a COVID-19 case and serial intervals. France, 24 January 2020–30 March 2020 (n = 418 cases)
In panel B, cases with no infected contacts have no generations. Panel C, contact tracing considers all index cases, including those who had no identified transmission chain and are therefore not in the transmission network panel of Figure 4A. For retrospective investigations, this distribution represents all infectors and infectees, including cases with no identified onward transmissions. In panels A, B and C, insets show a portion of the same data after removing the first two bars.
