FDA OKs another Pfizer, Moderna COVID booster for 50 and up

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FDA OKs another Pfizer, Moderna COVID booster for 50 and up
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Until now, the FDA had cleared fourth doses only for people 12 and older who have severely weakened immune systems. The agency said this especially fragile group also can get an additional booster, a fifth shot.

— even as vaccination has stalled. About two-thirds of Americans are fully vaccinated, and half of those eligible for a first booster haven’t gotten one.

None of the COVID-19 vaccines are as strong against the omicron mutant as they were against earlier versions of the virus. Also, protection against milder infections naturally wanes over time. But the immune system builds multiple layers of defense and the type that prevents severe illness and death is holding up.

Preliminary data posted online last week suggested some benefit: Israeli researchers counted 92 deaths among more than 328,000 people who got the extra shot, compared to 232 deaths among 234,000 people who skipped the fourth dose. Plus, a longer interval between shots helps the immune system mount a stronger, more cross-reactive defense.

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