Abstract
• Nosocomial transmission of SARS-CoV-2 between healthcare workers is evident. • Ethnicity is associated with SARS-CoV-2 antibody seroprevalence. • Socioeconomic factors influence risk of infection with SARS-CoV-2. • SARS-CoV-2 screening strategies must adapt to local healthcare contexts. • Collider bias can affect the interpretation of observational cohort data.
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