A subvariant of omicron responsible for a wave of new COVID-19 cases in parts of Europe and Asia is also gradually spreading in the United States, including in Washington state.
UW Medicine is launching a trial sponsored by the National Institutes of Health (NIH) to test the safety and effectiveness of COVID-19 vaccine booster doses.
With variants becoming the new dominant COVID-19 strains around the world, a UW Medicine trial will test the safety and effectiveness of booster vaccine shots for fully vaccinated people.