Fig. 2: Seroconversion rate (SCR) per 100 person-years in 1–5-year-olds.

A Density distributions of the SCR for 34 evaluation units (N = 32,926 children). For each evaluation unit, the black vertical line shows the median estimate, and the density distributions depict the uncertainty about the median. EUs are colored by programmatic response category (Methods) and ordered by increasing median SCR value. The unclassified evaluation units are shown in Supplementary Fig. 1. B Pooled density distributions of the SCR for each category.