https://www.siliconvalley.com/2021/05/18/covid-who-should-check-your-vaccination-status/

Most Californians are OK with having to show proof they have been vaccinated or tested negative for coronavirus to get into sports stadiums or concert venues, according to a new UC Berkeley poll. But they are a lot less sure about the government setting up a vaccine verification system.

The poll from the Institute of Governmental Studies looked at those significant questions facing California now that 15.8 million residents are fully vaccinated against COVID-19, another 4.7 million are at least partially inoculated and health officials are debating when to relax mask mandates for people who have gotten their shots.