coronavirus December 21, 2021 11:07 pm Party Leads to Dozens of COVID Breakthrough Cases in Marin County A party inside a restaurant in Marin County led to more than two dozen breakthrough COVID cases. Jean Elle reports. US & World Videos 1:08 Antioch school supervisor placed on leave after NBC Bay Area worker bullying report 3:23 UC Davis finds brain sizes are growing 3:36 Waymo expands driverless taxi service 2:32 Officials release footage of suspected vehicle involved in mail carrier robbery 2:01 New proposal aims to make Front Street San Francisco's entertainment zone