Browse By Topic Vaccines

Do Pfizer and Moderna vaccines prevent SARS-CoV-2 infection? Can you transmit the virus after you’ve been vaccinated? How effective are mRNA vaccines in real world scenarios?

J&J joins Pfizer and Moderna and becomes the third COVID-19 vaccine to receive EUA in the U.S. Learn more about these and other mRNA and adenovirus-based vaccines being used around the world.

Three COVID-19 vaccines have received emergency use authorization (EUA) in the U.S. But open questions remain, including the durability of immunity in the face of SARS-CoV-2 variants.