LONDON – AstraZeneca says advanced trial data from a U.S. study on its COVID vaccine shows it is 79% effective.
Although AstraZeneca's vaccine has been authorized in more than 50 countries, it has not yet been given the green light in the U.S.
The U.S. study comprised 30,000 volunteers, 20,000 of whom were given the vaccine while the rest got dummy shots. The results were announced Monday.
In a statement, AstraZeneca said its COVID-19 vaccine had a 79% efficacy rate at preventing symptomatic COVID and was 100% effective in stopping severe disease and hospitalization.