Question 8 of 33 in Coronavirus Outbreak
Started Jul 02, 2020 10:00PM UTC   •   Closing Aug 31, 2020 06:59AM UTC

How many U.S. states will have a 1.0 or greater effective reproduction number (Rt) for COVID-19 as of 31 August 2020?


The Rt is "the average number of people who become infected by an infectious person" ( The outcome will be determined by the latest Rt COVID-19 data for states with an Rt estimate of 1.0 or greater as of 31 August 2020 at As of 2 July 2020, 38 states were at or above a 1.0 estimate. For the purposes of this question, the District of Columbia is considered a state.

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Name Probability
24 or fewer 38%
Between 25 and 30 50%
Between 31 and 36 12%
Between 37 and 42 0%
43 or more 0%

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