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US Health Agency Updates Guidelines on COVID-19 Transmission

VOA News

   The U.S. Centers for Disease Control and Prevention is now
   acknowledging that COVID-19 can spread through small particles in the
   air over an extended distance and for hours at a time.

   The CDC has long insisted that the coronavirus is transmitted mainly
   between people standing within two meters of each other, through
   droplets produced by talking, breathing, coughing or sneezing.

   But [1]the agency updated its guidelines on its website Monday citing
   evidence from previous research that the virus can linger in the air
   through small droplets known as aerosols in "limited, uncommon
   circumstances" where someone with COVID-19 infected others more than
   two centimeters away or shortly after the infected person left an area.

   The updated guidelines say the transmission in such instances "occurred
   in poorly ventilated and enclosed spaces that often involved activities
   that caused heavier breathing, like singing or exercise," which may
   contribute to "the buildup of virus-carrying particles."

References

   1. https://www.cdc.gov/media/releases/2020/s1005-how-spread-covd.html

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