coronavirus March 15, 2024 7:43 am Interview: Doctor's perspective on COVID 4 years after shutdown started UCSF infectious disease specialist Dr. Peter Chin-Hong addresses where we are now four years since the start of the COVID-19 shutdown. US & World Videos 1:58 New XEC COVID-19 variant starting to spread overseas 4:02 Updated COVID vaccines coming 3:12 California experiencing COVID summer surge 1:58 COVID summer surge: CDC data shows cases ‘very high' in California 2:23 Bay Area COVID-19 levels on the rise this summer