Incidence of SARS-CoV-2 infection among healthcare workers before and after COVID-19 vaccination in a tertiary paediatric hospital in Warsaw: a retrospective cohort study
Kasztelewicz Beata1, Skrok Katarzyna1, Burzyńska Julia1, Migdał Marek2, Dzierżanowska-Fangrat Katarzyna1
1 Department of Clinical Microbiology and Immunology, The Children’s Memorial Health Institute, Warsaw, Poland.
2 The Children’s Memorial Health Institute, Warsaw, Poland, CEO of the CMHI.