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For now, there’s no exact timeline for how long immunity persists after getting the booster, according to Dr. Andy Pekosz, co-director of the Center of Excellence for Influenza Research and Response at the Johns Hopkins Bloomberg School of Public Health. This is because the vaccine is new — it was authorized at the end of August by the Food and Drug Administration.
“It’s important to note that there are lots of studies that are measuring” the immunity timeline, he said ― and many of those studies are happening now.
One study published in the New England Journal of Medicine found that this new shot’s protection lasted at least a month (but it likely lasts longer than that, since the study has measured only a month so far). Additionally, previous studies of other bivalent COVID vaccines showed that immunity lasted about six months.
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