Moderna found that the new booster triggered five times more antibodies against omicron BA.5 than the old vaccines in people with prior infections.
indicating that the boosters provide better protection against omicron BA.5 than the old shots. Dr. Peter Marks, head of the FDA's vaccine division, said the consistency between Moderna's and Pfizer's results were"very encouraging."
Public interest in data on the boosters is high because the FDA authorized them without direct human data on how they perform. The agency relied instead on clinical trial data from a similar booster that targeted omicron BA.1, the original version of omicron that caused the massive wave last winter. The FDA pushed back against those studies, arguing that they were too small to draw definitive conclusions about the shots.
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