Duration of Covid-19 Vaccine Protection in England A test | UPDATES IN MEDICINE
Duration of Covid-19 Vaccine Protection in England
A test-negative case–control study involving more than 6 million persons in England who received two doses of the ChAdOx1-S (AstraZeneca) or BNT162b2 (Pfizer) vaccine (interval, 3 to 12 weeks) showed high vaccine effectiveness against hospitalization and death from Covid-19 at 20 weeks or more after vaccination. Protection against infection waned. Waning was greater in older persons and those with underlying risk factors.
