An alarming simulation of how a single cough could spread particles through a grocery store shows why it's so important to wear masks to combat the spread of coronavirus
In the simulation, particles from a person in one aisle spreads up and over the shelves into the aisle next to it.
The simulation shows the cough spreading aerosolized particles — droplets small enough to stay suspended in the air and move freely. Experts said the model should be taken with a grain of salt. "Our risk of acquiring it and getting enough of that virus aerosol is completely unknown," said Dr. Kumi Smith, an assistant professor of epidemiology and community health at the University of Minnesota.
"In the real world, droplet transmission within three to six feet accounts for vast majority of transmissions," Schaffner said. "Airborne" particles go farther and stay in the air for longer, but transmission from those smaller droplets "probably doesn't happen very often," he said. "Any little bit helps," Schaffner said. "Their principal function is to stop spreading. We're all protecting each other." There's a misconception that the coronavirus "comes from people that you don't know," Smith said, which leads to people letting their guards down with family and friends.
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