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Kaplan–Meier cumulative incidence curves for the symptomatic, PCR-confirmed COVID-19 in participants who received at least one dose of vaccine or placebo.
Cumulative incidence was calculated using the Kaplan–Meier method as implemented in GraphPad Prism 8.4.8. Dotted lines represent the 95% confidence intervals. Arrows indicate the first and second immunisations. Numbers of individuals at risk for the specified time points are shown below the graph.
