A woman rubs antibacterial gel into her hands as she waits in a distanced line to get tested for COVID-19 at a mobile diagnostic tent in San Gregorio Atlapulco in the Xochimilco district of Mexico City, Wednesday, July 22, 2020. The capital’s health secretariat has erected mobile testing units in the areas of the city hardest hit by the coronavirus pandemic, but with test supplies limited – on Wednesday only 20 were available in San Gregorio Atlapulco – some symptomatic people end up waiting in line on multiple days before successfully getting a test.