There is evidence that the three vaccines currently in use in the U.S. (Pfizer-BioNTech, Moderna and Johnson & Johnson/Janssen) are likely to be effective against the major COVID-19 variants.
Please remember that vaccines are just one of several tools to help end the pandemic. It is essential for everyone, including those who have been vaccinated, to continue using all the tools available to help stop the spread of infection, including covering mouth and nose with a mask, washing hands often, staying at least 6 feet away from others, testing when indicated, and following all guidance from state and county health officials.