According to a News Release from the Governor's Office posted on July 26, 2021:
Today, the State of California is taking decisive action to combat the spread of COVID-19 and protect vulnerable communities – implementing a first-in-the-nation standard to require all state workers and workers in health care and high-risk congregate settings to either show proof of full vaccination or be tested at least once per week, and encourage all local government and other employers to adopt a similar protocol.
California will also be requiring health care settings to verify that workers are fully vaccinated or tested regularly. Unvaccinated workers will be subject to at least weekly COVID-19 testing and will be required to wear appropriate PPE. This requirement also applies to high-risk congregate settings like adult and senior residential facilities, homeless shelters and jails. These steps will help protect vulnerable patients and residents.
The new policy for state workers will take effect August 2 and testing will be phased in over the next few weeks. The new policy for health care workers and congregate facilities will take effect on August 9, and health care facilities will have until August 23 to come into full compliance.
Read more from the news release.