California’s 600,000 teachers and other school staff must be vaccinated or submit to weekly testing, a first-in-the nation requirement Gov. Gavin Newsom announced Wednesday morning in Oakland. The order will fully take effect Oct. 15, two months into the school year for some school districts. But the governor said he believes many school districts will set a deadline prior to that, which San Francisco and Oakland have already done. Credit: Caron Creighton and Jessica Christian Read more: https://trib.al/uSfJpYi Subscribe to our channel: http://bit.ly/2Svdkii — The San Francisco Chronicle delivers the Bay Area’s best journalism every day. Our mission is to tell the story of San Francisco — the city whose people change the world. We will inform, inspire and provoke while being honest, fearless and startlingly original. You can support our newsroom by signing up for a membership at http://SFChronicle.com/subscribe.