Omicron Variant December 22, 2021 4:33 pm Which Mask Works Best on Omicron Variant? Experts are reevaluating which types of face coverings offer the best protection as the omicron variant rapidly spreads. NBC 7’s Amber Frias reports. US & World Videos 0:23 Pro-Palestinian encampment on UC San Diego campus continues for third day 2:00 Relocation of historic homes makes way for a new park in downtown San Diego 0:10 Pine Valley Cemetery 2:07 San Diego Seals riding energy of ‘The Electric Factory' into National Lacrosse League semifinals 2:44 Del Mar bluffs project in final phase, but big changes for the railway are in the works