Coronavirus Is Spreading Quickly in 31 of 50 U.S. States, Data Shows

The novel coronavirus continues to infect Americans across the country and is spreading at an increased rate in 31 out of 50 states, according to new data.

The data, which was released by, shows values for Rt, a key metric indicating how fast the virus is spreading, according to the site. “It’s the average number of people who become infected by an infectious person. If Rt is above 1.0, the virus will spread quickly. When Rt is below 1.0, the virus will stop spreading,” the site says.