Figure 4. Reported number of COVID-19 cases and tests and estimated time-varying reproductive numbers for select US states.
(A) The cumulative number of confirmed cases (blue) and individuals tested (red) are plotted on the log10 scale for March 4 to April 17, 2020. (B) The percent of tests positive (purple) and the estimated value of the time-varying reproductive number (Rt, green) are plotted for March 4 to April 17, 2020. April 5 is the last day that the value of Rt can be reliably estimated; uncorrected (grey) and corrected (black) values of Rt are plotted for April 2 to April 16. The vertical dotted lines represent the dates that stay-at-home orders were issued in each state.