Breaking News: Pfizer said its two-shot vaccine didn’t perform adequately in children 2 to 5, and it will test a three-dose series for official authorization.

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Breaking News: Pfizer said its two-shot vaccine didn’t perform adequately in children 2 to 5, and it will test a three-dose series for official authorization.

BREAKING NEWS

Pfizer said its two-shot vaccine didn't perform adequately in children 2 to 5, and it will test a three-dose series for official authorization.

Friday, December 17, 2021 1:49 PM EST

A low dose of the Pfizer-BioNTech coronavirus vaccine did not produce a potent immune response in children 2 through 5 years of age, the companies announced, a discouraging setback that threatens to keep the vaccine from younger children for longer than many parents had hoped.

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Breaking News: Pfizer said its two-shot vaccine didn’t perform adequately in children 2 to 5, and it will test a three-dose series for official authorization.

Pfizer said its two-shot vaccine didn't perform adequately in children 2 to 5, and it will test a three-dose series for official authorization.

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