 The CDC, meanwhile, says the virus is growing in 44 states and Washington, D.C., and declining in zero states. Officials note that cases are undercounted because they only reflect tests done in medical facilities. There's also a drop-off in testing among people who feel sick. Experts have been tracking a new variant that's highly transmissible, but not more severe. Doctors continue to urge people to stay up to date on their vaccinations.