COVID-19 — Worldwide/Unknown
Background: As of 26 Mar 2021, the Africa CDC had reported 4 159 055 cases of COVID-19 and 111 357 deaths among the 55 African Union Member States; however, no country has published a nationally representative serosurvey as of May 2021. Such data are vital for understanding the pandemic’s progression on the continent, evaluating containment measures, and policy planning.
Methods: We conducted a cross-sectional, nationally representative, age-stratified serosurvey in Sierra Leone in March
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