Tuesday Ward of West View in Pittsburgh receives a COVID-19 booster shot at Allegheny General Hospital on Pittsburgh's North Side on Thursday, Sept. 23, 2021. The U.S. vaccination drive against COVID-19 stood on the verge of a major new phase as government advisers Thursday recommended booster doses of Pfizer's vaccine for millions of older or otherwise vulnerable Americans — despite doubts the extra shots will do much to slow the pandemic. (Steve Mellon/Pittsburgh Post-Gazette via AP) **FILE**
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