https://www.siliconvalley.com/2021/08/19/another-step-toward-covid-vaccine-passport-california-san-francisco-san-jose-gear-up-for-new-mandates/

California took another step toward a vaccine passport on Wednesday with a new rule that requires more than a ticket for indoor events of 1,000 people or more: You’ll have to show proof that you are fully vaccinated or have tested negative for COVID-19 within 72 hours to get in the door.

The Golden State’s vaccine verification for concerts, conventions and sporting events, which begins next month, is the first for a state in the U.S., expanding on an earlier state order for events with a minimum of 5,000 people. And it mirrors a growing list of similar vaccine requirements — in public and private workplaces and imposed by individual cities and counties — as the state battles another surge of infections from the highly contagious delta variant.