The county expanded access to the vaccine as the mass vaccination site at the Oakland Coliseum shifted from federal control to a joint Alameda-Contra Costa county operation.
Around half of California residents age 65 and older are fully vaccinated, according to CDC data -- but that percentage swings wildly from county to county.
California has no plans to administer a passport. But the state is sending mixed messages to businesses about the need to verify that people at large events are vaccinated.
The FEMA-operated site was set to close April 11, but with the supply of vaccines increasing, health officials said it makes sense to keep the doors open.
The critical footnote to Gov. Gavin Newsom's announcement is that the state see no new surges during the spring or summer and that regardless of tiering, mask mandates will remain in effect.