Officials are concerned about 3 #COVID19 variants detected in the U.S. The B.1.1.7 variant (first identified in UK) is currently the most common, with 1,523 cases detected in 41 states and D.C. Stop new variants by preventing the spread of COVID-19. More: https://t.co/F4bAyObDp1 https://t.co/96NWbMPrFP