by Todd Richmond and Kathleen Foody In this Aug. 28, 2021, file 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...
