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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 ...
There are no human data yet on the new Omicron booster, but past research hints at an answer.
In the context of flu, the U.S. Centers for Disease Control and Prevention says "vaccination should ideally be offered during September or October." Some have suggested that one ideal time to get ...
A 10-state analysis released by the CDC in February found that a COVID booster was 91% effective against hospitalization two months after vaccination as Omicron spread. After four months, however ...
In June 2022, Pfizer and Moderna developed bivalent vaccines to protect against the SARS-CoV-2 wild-type and the Omicron variant. The bivalent vaccines are well-tolerated and offer immunity to Omicron superior to previous mRNA vaccines. [268] In September 2022, the United States Food and Drug Administration (FDA) authorized the bivalent vaccines.
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 ...
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Though COVID-19 vaccines and boosters provide strong protection against severe disease, hospitalizations, and deaths, the quickly-spreading Omicron variant remains a significant challenge.