Before revision:  A hypothetical national stay-at-home order issued on March 13, 2020 when a national emergency was declared might have reduced cumulative infections by 62.3 \%, and might have helped to reverse exponential growth in the disease by April 5.
After revision:  A hypothetical national stay-at-home order issued on March 13, 2020 when a national emergency was declared might have reduced cumulative infections by 62.3 \%, and might have helped to reverse exponential growth in the disease by April 10.