The FDA ordered vaccine makers to tweak their shots to target BA.4 and BA.5. Pfizer and its partner BioNTech aim to offer updated boosters to people 12 and older, and shots could begin within weeks if the FDA quickly clears the modified vaccine.
The Food and Drug Administration ordered vaccine makers to tweak their shots to target BA.4 and BA.5. Pfizer and its partner BioNTech aim to offer updated boosters to people 12 and older, and shots could begin within weeks if the FDA quickly clears the modified vaccine.
Pfizer and its partner BioNTech aim to offer updated boosters to people 12 and older, and shots could begin within weeks if the FDA quickly clears the modified vaccine - a step not expected to require waiting on new studies. For now at least. BA.5 currently is causing nearly all COVID-19 infections in the U.S. and much of the world. There's no way to know if it still will be a threat this winter -- or if another mutant will have replaced it.
The news comes after Britain a week ago became the first in the world to authorize a different update to Moderna's COVID-19 vaccines -- shots that add protection against the original omicron that struck last winter. Pfizer previously announced results from a study that found its earlier omicron tweak significantly revved up antibodies capable of fighting the first omicron version, called BA.1, and to a lesser degree the genetically distinct BA.4 and BA.5 omicron relatives. Its application to the FDA contains that data plus animal testing of the newest recipe update.Pfizer and BioNTech expect to start a trial using the BA.4 and BA.
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