A new COVID variant is now the dominant strain. But that doesn't mean another surge for AZ

The Food and Drug Administration authorized second Pfizer and Moderna COVID-19 booster shots March 29 for everyone 50 and older; the Centers for Disease Control and Prevention is expected to issue further guidance on boosters soon, as well. The move is seen as an attempt to protect older Americans whose immunity may be waning, in case there’s another surge.

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