COVID-19 Vaccine Breakthrough Infections Reported to CDC — United States, January 1–April 30, 2021 | MMWR
Description
As of April 30, 2021, approximately 101 million people in the U.S. had been fully vaccinated against COVID-19. Almost 10,300 COVID-19 vaccine breakthrough infections were reported from 46 states and territories. Vaccine breakthrough infections occur in only a small fraction of all vaccinated people.