Waning immunity against COVID-19 reinfections: Lessons from Singapore cohort study
06 Jul 2023
A retrospective national cohort study in Singapore assessed hybrid immunity from previous infection and monovalent vaccination against medically attended symptomatic BA.4, BA.5, and XBB reinfections.
This study highlights the immune evasiveness of the XBB variants. All human viruses adapt to become more transmissible, more immune evasive, and less virulent over time, and SARS-CoV-2 is no exception.Resources
Waning immunity against COVID-19 reinfections: Lessons from Singapore cohort study
Waning immunity against COVID-19 reinfections: Lessons from Singapore cohort study