Biden announces US will donate another 500m vaccine doses at Covid summit – as it happened

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• Doses are in addition to the over 600m the US has committed to sending
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12.37am BST

Advisers to the Centers for Disease Control and Prevention (CDC) met to discuss who should get booster shots of the Pfizer-BioNTech vaccine.

After the Food and Drug Administration last week concluded that those over 65 and those with severe risk should get boosters, the CDC will make further recommendations as to which specific groups shuold qualify for a third shot.