Before revision:  These drops are much larger and faster than those previously reported and surprisingly do not correlate well with our model parameters (such as the contact rateor testing rate) or state/national metrics such as the population density, GDP, and median age.
After revision:  These drops are much larger and faster changes than reported in empirical studies, such as the 18\% decrease in mortality found for the New York City hospital system from March to August 2020 (Horwitz et al, Trends in Covid-19 risk-adjusted mortality rates, J. Hosp. Med. 2020). Our reported decreases surprisingly do not correlate well with our model parameters (such as the contact rateor testing rate) or state/national metrics such as the population density, GDP, and median age.