The current booster is targeted at the BA.4/BA.5 variants. Now, XBB represents the majority of cases. The new study found that, despite the mismatch in variants, the booster remains protective against XBB.
have received the latest bivalent booster – about 15% of the population – compared with nearly 270 million who have had at least one dose of the original vaccine. There is no data to show whether the bivalent vaccine is more protective than a monovalent vaccine would have been, since everyone in the U.S. received the bivalent version.
Most people who haven't gotten the recent booster were last vaccinated more than a year ago so their protection against mild disease was expected to have faded, just as it fades after an infection. The new study only looked at the chance of suffering relatively mild symptoms from a recent infection, not severe disease.
Other data the CDC plans to release later Wednesday shows that being vaccinated reduces the risk of death 13-fold compared to being unvaccinated, while being up-to-date on boosters provides a two-fold reduction in risk, officials said on the call.within about three months against XBB, faster than against other variants. Health and patient safety coverage at USA TODAY is made possible in part by a grant from the Masimo Foundation for Ethics, Innovation and Competition in Healthcare.
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