In this Aug. 28, 2021, photo, Mayra Navarrete, 13, receives the Pfizer COVID-19 vaccine from registered nurse, Noleen Nobleza at a clinic set up in the parking lot of CalOptima in Orange, Calif. With more than 40 million doses of coronavirus vaccines available, U.S. health authorities said they're confident both seniors and other vulnerable Americans seeking booster shots and parents anticipating approval of initial shots for young children will have easy access. (AP Photo/Jae C. Hong) **FILE**
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