Fig. 2: Kaplan–Meier plot of vaccine effectiveness against COVID-19 in the full analysis population.

Lines represent point estimates. + Represents participants who were censored. The shading represents the 95% confidence interval. IM Ad5-nCoV adenovirus type 5 vectored COVID-19 vaccine through intramuscular injection, IH Ad5-nCoV adenovirus type 5 vectored COVID-19 vaccine through oral inhalation.