During that time, about 22% of tests came back positive, Maurer said. The number of tests increased significantly throughout the blitz to about 1,400 a week. There have been times since the testing blitz began that the number of cases returning positive results has been higher than before, but that number still makes up only a small percentage overall. While on May 1, there were 496 confirmed cases, as of May 19 that number had grown to 896. In the three zip codes that cover Flagstaff and Northern Arizona University, the number of confirmed cases increased from about 58 to over 185.

Source: Daily Sun May 20, 2020 15:33 UTC