Pfizer seeks OK of updated COVID vaccine booster for fall.
- Pfizer asked U.S. regulators Monday to authorize its combination COVID-19 vaccine that adds protection against the newest omicron relatives — a key step toward opening a fall booster campaign. to target BA.4 and BA.5 that are better than ever at dodging immunity from earlier vaccination or infection.
Moderna is expected to file a similar application soon, and the U.S. has a contract to buy 66 million doses of its updated vaccine.
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