Population-based serosurveys are recommended to estimate the proportion of a population already infected with severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2). Repeated cross-sectional serosurveys conducted in the same geographical location provide estimates to monitor trends over a period of time (World Health Organization, 2020a). Information from repeated cross-sectional surveys is valuable for public health decision makers to design and revise containment strategies. A meta-analysis undertaken by Chen et al.
