State government policies about vaccine requirements
Proof-of-vaccination requirements are business or government requirements that people prove they have been vaccinated against COVID-19. State governments have enacted various rules around the use of proof-of-vaccination requirements in their states, such as banning proof-of-vaccination requirements in some circumstances or implementing policies—sometimes called vaccine passports—that allow vaccinated people to bypass COVID-19 restrictions or engage in activities unavailable to unvaccinated people.
Twenty states, all with Republican governors, prohibit proof-of-vaccination requirements. In eleven states, governors banned proof-of-vaccination requirements through executive orders. In nine states, legislators passed laws banning proof-of-vaccination requirements.
Five states—California, New York, Hawaii, and Oregon, and Washington—have facilitated the creation of digital vaccination status applications or passed laws or enacted orders exempting fully vaccinated individuals from some COVID-19 restrictions if they can provide proof of vaccination. All five states have Democratic governors.
https://ballotpedia.org/State_government_policies_about_vaccine_requirements_(vaccine_passports)