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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 ...
While the current vaccines are holding up well against hospitalization, severe disease and death, "they do not elicit a high antibody response against Omicron subvariants, the most prevalent ...
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 ...
A January 2022 study by the UK Health Security Agency found that vaccines afforded similar levels of protection against symptomatic disease by BA.1 and BA.2, and in both it was considerably higher after two doses and a booster than two doses without booster, [261] [262] though because of the gradually waning effect of vaccines, further booster ...
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There are no human data yet on the new Omicron booster, but past research hints at an answer.
Two-dose COVID-19 vaccine regimens do not induce enough neutralising antibodies against the new variant, British scientists found. Two-dose vaccines induce lower antibodies against Omicron, study ...
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 ...