Seroprevalence of SARS-CoV-2 in Sweden, April 26 to May 9, 2021
Jessica Beser, Ilias Galanis, Theresa Enkirch, Sharon Kühlmann‐Berenzon, Edward van Straten, Jan Duracz, Marie Rapp, Katherina Zakikhany, Mikael Mansjö, Julia Wigren Byström, Mattias N.E. Forsell, Ramona Groenheit, Karin Tegmark Wisell, Andreas Bråve
Abstract
A national point seroprevalence study of SARS-CoV-2 was conducted in Sweden in April-May 2021. In total, 2860 individuals 3 to 90 years old from a probability-based web panel were included. Results showed that an estimated 32.6% of the population in Sweden had detectable levels of antibodies, and among non-vaccinated 20.1% had detectable levels of antibodies. We tested for differences in seroprevalence between age groups and by sex and estimated seroprevalence among previously infected participants by time since reporting.