California’s COVID variant: How it spreads and if vaccines are less effective against it

Lynda Barbieri, a Santa Clara County resident, is inoculated against the coronavirus disease (COVID-19) by clinical nurse Lynette Ancheta at a vaccination site run by the Santa Clara County health department at Levi's Stadium, in Santa Clara, California, U.S. February 9, 2021. Photo by REUTERS/Brittany Hosea-Small

One new coronavirus variant is homegrown in California. New research coming out of UC San Francisco suggests California’s variant could account for 90% of infections in this state by the end of March. There are concerns that it’s more transmissible or could outwit vaccines currently on the market. 


Dr. Peter Chin-Hong - professor of medicine who specializes in infectious diseases at the University of California San Francisco

Madeleine Brand

Sarah Sweeney, Angie Perrin, Michell Eloy, Amy Ta, Rosalie Atkinson, Brian Hardzinski, Bennett Purser