SARS-CoV-2 seroprevalence in students and teachers: a longitudinal study from May to October 2020 in German secondary schools

Study (n=1538 students, 507 teachers) found seroprevalence of antibodies was 0.6% in May/June and the same in Sept/Oct. Of 12 persons with positive serology 5 had known history of confirmed COVID-19; 23/24 participants with household history of COVID-19 were seronegative.

BMJ Open