Here are some things to know:
IF I JUST GOT ONE OF THE ORIGINAL BOOSTERS, SHOULD I GET THE NEW KIND RIGHT AWAY?
That’s because someone who recently got a booster already has more virus-fighting antibodies in their bloodstream. Antibodies gradually wane over time, and another shot too soon won't offer much extra benefit, explained Wherry, who wasn’t involved with the government’s decision-making.It’s still important to get vaccinated even if you’ve already been infected -- but timing matters here, too.
The FDA cleared the new boosters based in large part on human studies of a similarly tweaked vaccine that’s just been recommended by regulators in Europe. Those tweaked shots target an earlier omicron strain, BA.1, that circulated last winter, and studies found they revved up people’s virus-fighting antibodies.
Most Americans eligible for an updated booster have gone at least six months since their last shot, according to the CDC — plenty of time that another shot should trigger a good immune response.
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