Point prevalence of SARS-CoV-2 infection in Sweden at six time points during 2020
BackgroundIn order to estimate the prevalence and understand the spread of SARS-CoV-2 in Sweden, the Public Health Agency of Sweden, with support from the Swedish Armed Forces, conducted a series of point prevalence surveys between March and December 2020.MethodsSampling material and instructions on how to perform self-sampling of the upper respiratory tract were delivered to the homes of the part