F.D.A. Authorizes Pfizer Booster Shot for Higher-Risk People

Regulators said that people over 65 or at high risk of severe Covid-19 were eligible for an extra shot, setting up a staggered national booster campaign.,Regulators said that people over 65 or at high risk of severe Covid-19 were eligible for an extra shot, setting up a staggered national booster campaign.

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