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.