Pfizer asks the FDA to authorize an updated booster shot.
on a different version of a bivalent shot, one that targeted the original omicron variant. That booster was shown to be safe and produced an immune response.
Dr. Jesse Goodman of Georgetown University, a former FDA vaccine chief, said it “makes sense” to update the vaccines to target new variants circulating. It is “likely” the immune responses in people will be similar to those seen in the animal studies, he said, but “it is not known until human data are available.”
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