How many U.S. states will have a 1.0 or greater effective reproduction number (Rt) for COVID-19 as of 11 January 2021?
The Rt is "the average number of people who become infected by an infectious person" (Rt.live). 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 11 January 2021 at https://rt.live. As of 18 August 2020, 20 states were at or above a 1.0 estimate. For the purposes of this question, the District of Columbia is considered a state.