Publication | Open Access

Protection against omicron (B.1.1.529) BA.2 reinfection conferred by primary omicron BA.1 or pre-omicron SARS-CoV-2 infection among health-care workers with and without mRNA vaccination: a test-negative case-control study

VaccinationVaccine SafetyVaccine DevelopmentImmunologyVirologyInfection ControlPrimary Omicron Ba.1MedicineMrna VaccinationBa.2 ReinfectionCovid-19