FILE - In this Feb. 8, 2021, file photo, California Governor Gavin Newsom speaks at a news conference at Petco Park, which will host a vaccination site in a parking lot next to the ballpark in San Diego. California's new system of delivering, tracking and scheduling coronavirus vaccines goes live Sunday, Feb. 21, 2021, for 7 million people in a handful of counties as Gov. Gavin Newsom attempts to smooth out what has been a confusing and disjointed rollout hampered by limited national supply. (Sandy Huffaker/The San Diego Union-Tribune via AP)

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's new system of delivering, tracking and scheduling coronavirus vaccines goes live Sunday, Feb. 21, 2021, for 7 million people in a handful of counties as Gov. Gavin Newsom attempts to smooth out what has been a confusing and disjointed rollout hampered by limited national supply. (AP Photo/Jae C. Hong, File)