Timely booster vaccination reduces omicron breakthrough infections and COVID-19 severity

Researchers at the AIDS Institute, Department of Microbiology, School of Clinical Medicine, and the State Key Laboratory of Emerging Infectious Diseases, LKS Faculty of Medicine of The University of Hong Kong (HKUMed) reveals that the timely third vaccination of either CoronaVac or BNT162b2 is critical to induce activated virus-specific memory B cells and omicron cross-reactive T cell responses, leading to significantly reduced frequencies of breakthrough infection and disease severity.

source https://medicalxpress.com/news/2023-01-booster-vaccination-omicron-breakthrough-infections.html