In this June 15, 2020, photo, Berto Cortez, a CVS pharmacy technician, shows how COVID-19 tests are processed in a testing area set up by CVS at St. Vincent de Paul medical clinic in Phoenix. The number of deaths per day from the coronavirus in the U.S. has fallen in recent weeks to the lowest level since late March, even as states increasingly reopen for business. But scientists are deeply afraid the trend may be about to reverse itself. Ross D. Franklin/AP Photo