The World Health Organization had recently called for increased scientific study into the possibility that Covid-19 can linger in airborne droplets for hours, a possibility that had been omitted from U.S. back-to-work guidelines, which industry healthcare consultants say are going to lend more complexity to businesses who are struggling to implement workplace precautionary measures. Most companies, in preparing for workplace safety, have been trying to address concerns about the virus landing on surfaces after being emitted into the air. They have primarily been focusing on mask-wearing, upgrading ventilation systems, temperature checks, frequent restroom cleanings, and erecting plexiglass barriers. Some employers are slowing the return of workers from remote work; others, such as General Motors Company, Ford Motor Company, and Fiat Chrysler Automobiles, have improved ventilation in their manufacturing facilities out of concern for aerosol transmission.
See "Companies worry about adequate precautionary measures after World Health Organization expressed concern over airborne droplets", Caroline Humer, Reuters, July 20, 2020