Rt.live is a new COVID19 tracker, focused on measuring a key statistic about how fast the virus is growing.
The value they track, Rt, is the average number of people infected by someone carrying the virus. If the Rt number is above 1 in any particular place, community spread is active and accelerating fast, so extra precautions are needed. If the number is below 1, it’s a positive sign that transmission is down and aggressive measures are starting to curb the growth.
This data is very useful in understanding if stay-at-home orders are having an impact, and help inspire people to do their part.