Instagram co-founders Kevin Systrom and Mike Krieger recently developed a measure of how fast the COVID-19 virus is spreading, based on the average number of people who become infected by an infectious person. If the spread rate is above a certain value, the virus will spread quickly. When it is below that value, the virus will stop spreading. For more information on this measure, go here.

Systrom and Krieger applied their algorithm to spread rates in all 50 states plus Washington DC and found that infection rates are on a downward trajectory in 38 states. Check it out:

COVID-19 Spread+DR by State 4-21-20.png

I included current mortality rates for each state just to show the diverse impact COVID-19 has had across the country. We can speculate as to why, but it’s too early to reach firm conclusions.

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Reference:

“Instagram co-founders build a website to track how fast coronavirus is spreading in each state” by Matthew Tom/SFGATE   April 22, 2020