November 30, 2021 6:09 am Omicron Variant Shows Need to Get More Americans Vaccinated As long as there are people unprotected from the coronavirus, we are going to see variants like the new Omicron strain of COVID-19, says NBC medical correspondent Dr. John Torres. US & World Videos 2:12 Jeff's Forecast: Chilly start as temps jump into the 80s week 5:57 San Francisco is trying to ban cancer-causing chemicals in firefighter gear, but are alternatives safe? 1:53 5 sports icons inducted into the Bay Area Sports Hall of Fame 3:16 San Francisco mom highlights student safety on Muni after alleged anti-Asian attack 0:24 Murder suspect arrested following neighborhood lockdown in Antioch