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Two shots of COVID-19 vaccine without an additional booster offer essentially no lasting protection against infection with Omicron, and a coronavirus infection is as effective as a recent booster ...
Both Pfizer and Moderna’s Omicron boosters are "bivalent" vaccines, meaning they protect against Omicron BA.5 and BA.4 subvariants and the original SARS-CoV-2 virus. "The goal of a COVID vaccine ...
In contrast, two vaccine doses, followed by an initial omicron infection, may protect more against a second omicron infection than an extra jab, according to a preprint study published Nov. 1 to ...
Danish study shows decline in vaccine protection against omicron is restored with Pfizer booster Fact-check: Did a study show vaccinated people more likely to be infected with omicron? Skip to ...
The studies, which covering millions of patients nationwide, offer the first serious look at the impact of vaccines and booster shots as America grapples with the still-spreading omicron wave.
With new COVID-19 boosters expected later this year, health experts urge Californians not to put off a first or second booster shot until then.
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South African scientists are warning that reinfections among people who’ve already battled COVID-19 appear to be more likely with the new omicron variant than with earlier coronavirus mutants.