These are up-to-date values for Rt, a key measure of how fast the virus is growing. 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. Learn More.
4/26 model update: new Rt graphs reflect corrections for the amount of testing done over time in any given state. An increase or decrease in testing should not affect accuracy of Rt values in the future. This correction has significantly improved Rt values in most states.
