COVID-19 cases in the United States have been steadily increasing. This increase could be driven by more contagious variants of SARS-CoV-2, the virus that causes COVID-19. B.1.1.7, the most common variant in
the United States, has been reported in all 50 states and Puerto Rico. Learn more about these variants in CDC’s COVID Data Tracker Weekly Review: http://bit.ly/CDTweeklyreview.