This large, nationwide, population-based, seroepidemiological study provides evidence of the effectiveness of physical distancing (>1.5 m) and indoor group size reductions in reducing severe acute respiratory syndrome coronavirus 2 infection. Additionally, young adults may play an important role in viral spread, contrary to children up until age 12 years with whom close contact is permitted.
Clinical trials registration: NTR8473.
Keywords: COVID-19 pandemic; SARS-CoV-2 seroprevalence; social distancing; the Netherlands; transmission.
© The Author(s) 2021. Published by Oxford University Press for the Infectious Diseases Society of America.