On a normal afternoon in an apartment in the Del Valle neighborhood of Mexico City, open windows let in a cacophony: taco vendors calling out to passersby, low-flying aircraft, loudspeaker advertisements from fruit trucks and junk trucks and gas trucks. But since coronavirus made its way to this prosperous community, vendors have been replaced by quiet grocery delivery men, button-downed professionals are now working from their condos, and kids ride bikes in the driveways of gated privadas instead of at the neighborhood’s parks. All over Mexico City, red “Save Lives,…