omicron January 25, 2022 9:44 am Pfizer Testing Vaccine Targeting Omicron Pfizer announced Tuesday it has launched a clinical trial to test an updated COVID-19 vaccine that targets the omicron variant. US & World Videos 1:31 CDC recommends updated Covid shot for everyone ages 6 months and up 2:39 New COVID variant known as Eris causing rise in cases, experts say 2:05 Federal Covid-19 Public Health Emergency Ends After More Than 3 Years 2:05 After More Than 3 Years, COVID-19 Public Health Emergency Coming to an End 0:35 WHO: COVID Is No Longer a Global Health Emergency