Does the COVID-19 vaccine work?

Yes. The Pfizer and Moderna vaccines stop people 95% of the time from becoming sick from COVID-19 after getting the series of two shots.

We do not yet know how long the protection from the vaccine lasts, whether the vaccine stops people from giving COVID-19 to others, and whether the vaccine stops people from getting infected with COVID-19 altogether or just stops them from becoming sick when they do get infected with COVID-19. These questions are still being studied.