FILE - In this Feb. 16, 2021, file photo, motorists wait to get their COVID-19 vaccine at a federally-run vaccination site set up on the campus of California State University of Los Angeles, in Los Angeles. California is revamping a plan to help essential workers and seniors in underserved communities get coronavirus vaccinations after officials learned appointment access codes were leaked to people not eligible for the shots. The move comes as the state of 40 million people is striving to prioritize vaccinating the most vulnerable. (AP Photo/Jae C. Hong, File)

Nurse practitioner Delaram Mandegarian, right, helps South Los Angeles resident Annie Carmichael fill out medical forms before getting vaccinated with the Pfizer COVID-19 vaccine to prevent the coronavirus at the MLK Community Medical Group clinic in Los Angeles, Wednesday, Feb. 24, 2021. Eligible residents of South Los Angeles can get free vaccines at a series of vaccine clinics run by MLKCH. (AP Photo/Damian Dovarganes)

FILE - In this Feb. 16, 2021, file photo, a woman receives the COVID-19 vaccine at a joint state and federal mass vaccination site set up on the campus of California State University of Los Angeles, in Los Angeles. California is revamping a plan to help essential workers and seniors in underserved communities get coronavirus vaccinations after officials learned appointment access codes were leaked to people not eligible for the shots. The move comes as the state of 40 million people is striving to prioritize vaccinating the most vulnerable. (AP Photo/Jae C. Hong, File)

South Los Angeles resident Carol Mitchell fills out medical forms before getting her first dose of the Pfizer COVID-19 vaccine to prevent the coronavirus at the MLK Community Medical Group clinic in Los Angeles, Wednesday, Feb. 24, 2021. Eligible residents of South Los Angeles can get free vaccines at a series of vaccine clinics run by MLKCH. Current eligibility is limited for community members, including healthcare workers in Phase 1A and persons 65 years and older, that reside in Service Planning Area 6 of Los Angeles while supplies last. (AP Photo/Damian Dovarganes)