Figure 1

(a, b) Prevalence in South Africa obtained with the different proxies, smoothed with a rolling average of 14 days from June 18th to December 31st, 2021. In plot (a) we have the actual ratio (note that the y axis is in logarithmic scale). In plot (b) all curves are normalized so the smallest value is 0 and the largest value is 1. (c) Prevalence and (d) vaccination efficacy in South Africa among people with different levels of vaccination, estimated with Random Forest.