November 29, 2021 6:25 pm What to Know About the Omicron Variant A doctor explained to NBC 7’s Jackie Crea how the omicron variant is different, and why it poses such a threat. US & World Videos 0:52 Petco Park's summer concert lineup features acts from Teddy Swims to the Pixies 2:31 Mar Vista teacher aide accused of student sex assault appears in court 2:45 San Diego Police Department transitions to fully encrypted radio communications 3:51 Salvation Army's 2nd Donut Festival to be held on USS Midway 1:35 Mexico to hold country's first-ever judicial elections