Dr. Glenn Lopez administered a standard test for the coronavirus to Daniel Contreras at a mobile clinic in South Los Angeles last week. Though highly accurate, such tests can take days or more to process.

LOS ANGELES, CALIFORNIA – JULY 15: Dr. Glenn Lopez administers a COVID-19 test to Daniel Contreras at a St. John’s Well Child & Family Center mobile clinic set up outside Walker Temple AME Church in South Los Angeles amid the coronavirus pandemic on July 15, 2020 in Los Angeles, California. A clinic official said most of the residents they are currently testing in their South L.A. clinics are Latinos. According to the California Department of Health, Latinos are currently 2.9 times more likely than white people to test positive for the coronavirus. California reported over 11,000 new coronavirus infections today, the most in the state in a single day since the pandemic began. (Photo by Mario Tama/Getty Images)