Appendix 1—figure 22. Infection fatality rate (IFR) and seroprevalence measured in December 2020 using 0.1 as threshold and correcting for sensitivity, specificity, and reweighting by age and sex.

No seroreversion correction was performed to estimate the seroprevalence. That the wide confidence intervals for the IFR of Curitiba and Belo Horizonte are due to the small number of infections and deaths in these cities.