This terrifying animation shows how coronavirus particles from a single cough can hang in the air "several minutes" and spread across two aisles of a supermarket. Scientists created a computer simulation to study how far the virus can travel indoors - and worryingly found how a cloud of droplets will infect others even after the sick person has walked away. “Extremely small particles of this size do not sink on the floor, but instead, move along in the air currents or remain floating in the same place."