Protective immunity of SARS-CoV-2 infection and vaccines against medically attended symptomatic omicron BA.4, BA.5, and XBB reinfections in Singapore: a national cohort study
Celine Y. Tan, Calvin J. Chiew, Deanette Pang, Vernon J. Lee, Benjamin Ong, David Chien Lye, Kelvin Bryan Tan
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Herd immunityMedicineVaccinationCohortIncidence (geometry)ImmunityPoisson regressionChristian ministrySevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2)PopulationConcordanceCoronavirus disease 2019 (COVID-19)PediatricsDemographyImmunologyInternal medicineEnvironmental healthImmune systemDiseaseInfectious disease (medical specialty)PhysicsPhilosophySociologyTheologyOpticsSARS-CoV-2 and COVID-19 ResearchVaccine Coverage and HesitancyImmune responses and vaccinations