More Evidence Hybrid Immunity Confers Highest Level of COVID Protection

Extra Proof Hybrid Immunity Confers Highest Stage of COVID Safety

Hybrid immunity from a COVID-19 infection plus a vaccine provided an immune boost against symptomatic disease, as well as severe outcomes, Brazilian researchers found. Among people who survived a COVID infection from Feb. 24, 2020 to Nov. 11, 2021, vaccine effectiveness against symptomatic disease at least 14 days after series completion was 44.0% (95% CI…