For over a month now, Americans have been urged to practice social distancing and thus slow the spread of the novel coronavirus. Specifically, that has meant learning to try to stay six feet away from other human beings whenever possible. What you may not know, and what even some of the top experts in
For over a month now, Americans have been urged to practice social distancing and thus slow the spread of the novel coronavirus. Specifically, that has meant learning to try to stay six feet away from other human beings whenever possible.
On an interpersonal level, social distancing remains pretty simple. As the Centers for Disease Control and Prevention explains: “COVID-19 spreads mainly among people who are in close contact for a prolonged period. Spread happens when an infected person coughs, sneezes, or talks, and droplets from their mouth or nose are launched into the air and land in the mouths or noses of people nearby. The droplets can also be inhaled into the lungs.
“Individuals infected with respiratory viruses such as COVID-19 tend to produce droplets larger than 5 microns when they cough, sneeze or talk. Because of their size and weight, these droplets usually fall to surfaces within about a 3 to 6 foot distance,” said Brewer. “Any susceptible person within 3 to 6 feet of an infected person could have these droplets land on them and possibly become infected.
Complicating matters is that a growing array of experts and studies have pointed to the potential for “aerosol” transmission, where smaller droplets—tinier than the 5 microns Dr. Brewer mentioned—are in play. That could mean a wider infection radius. And, in keeping with recently-updated CDC guidelines, people should wear a face-covering or mask when in public, even if the evidence of their efficacy is less than spectacular.
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