U.S. health officials agreed to purchase another 105 million doses of Pfizer's COVID-19 vaccine in anticipation of a fall booster campaign.
The $3.2 billion deal announced by the Biden administration comes as federal scientists consider how to update the vaccines to better protect Americans from the rapidly evolving virus.
The first shots would be delivered by early fall, pending a decision by the Food and Drug Administration to authorize new versions of the shots. The current vaccines retain strong protection against hospitalization and death, but their ability to block infection dropped markedly when omicron appeared.
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