Omicron is now the dominant COVID strain in the U.S., making up 73% of new infections : Coronavirus Updates : NPR

City residents wait in a line extending around the block to receive free at-home rapid COVID-19 test kits in Philadelphia on Monday. Matt Rourke/AP hide caption toggle caption Matt Rourke/AP City residents wait in a line extending around the block to receive free at-home rapid COVID-19 test kits in Philadelphia on Monday. Matt Rourke/AP NEW…