PREreview of Long-term duration of protection of ancestral-strain monovalent vaccines and effectiveness of the bivalent BA.1 boosters against COVID-19 hospitalisation during a period of BA.5, BQ.1, CH.1.1. and XBB.1.5 circulation in England

The main findings of this paper regarding the association between vaccine effectiveness and hospitalization of people aged 65 years or older in terms of monovalent vaccine protection. Their case-control study found absolute vaccine effectiveness through 3 doses of monovalent vaccines for people of this age group for 6 months at a time.

The paper was clear and adequate, suggesting further evidence of the effectiveness of boosters in preventing hospitalization.

Competing interests

The author declares that they have no competing interests.