Surface transmission—from touching doorknobs, mail, food-delivery packages, and subways poles—seems quite rare. (Quite rare isn’t the same as impossible: The scientists I spoke with constantly repeated the phrase “people should still wash their hands.”) The difference may be a simple matter of time. In the hours that can elapse between, say, Person 1 coughing on her hand and using it to push open a door and Person 2 touching the same door and rubbing his eye, the virus particles from the initial cough may have sufficiently deteriorated.
he fact that surface areas—or “fomites,” in medical jargon—are less likely to convey the virus might seem counterintuitive to people who have internalized certain notions of grimy germs, or who read many news articles in March about the danger of COVID-19-contaminated food. Backing up those scary stories were several U.S. studies that found that COVID-19 particles could survive on surfaces for many hours and even days.
But in a July article in the medical journal The Lancet, Goldman excoriated those conclusions. All those studies that made COVID-19 seem likely to live for days on metal and paper bags were based on unrealistically strong concentrations of the virus. As he explained to me, as many as 100 people would need to sneeze on the same area of a table to mimic some of their experimental conditions. The studies “stacked the deck to get a result that bears no resemblance to the real world,” Goldman said.The Scourge of Hygiene Theater – The Atlantic