coronavirus July 30, 2021 6:43 am COVID-19 Vaccine Booster Trials Underway A select group of patients at UC Davis are getting a third dose of the Pfizer vaccine, as part of a nationwide trial to study the effects of a booster shot. Cierra Johnson reports. US & World Videos 2:43 California's tourism bounces back but SF lags behind 2:06 2 injured following stabbing in San Jose, police say 2:00 ‘Kayak-tivists' take Chevron protest out onto the Bay by Richmond 2:29 San Jose celebrates Cinco de Mayo with a pair of parades and festivals 0:22 Police investigating double stabbing in San Jose
