BREAKING NEWS

The F.D.A. authorized Pfizer boosters for 16- and 17-year-olds, clearing the way for several million teenagers to get an additional shot.

Thursday, December 9, 2021 11:40 AM EST

The decision, which was expected, comes as an initial spate of laboratory tests have suggested that the new fast-spreading variant, Omicron, seemed to dull the power of two doses of the Pfizer vaccine.

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