The CDC did not respond Sunday to requests to discuss the update. As with some other updates, the CDC made the fundamental changes to its guidance without issuing an announcement. Researchers studying transmission of the deadly virus noticed the new guidance Sunday on the CDC's website, labeled as an update from Friday. The CDC also said - and still says - that people may become infected by touching something that has the virus on it and then touching their mouth, nose or eyes, but that touch is not the main way it spreads. Previously, the federal health agency had said the coronavirus spreads mainly between people within about six feet of one another and through direct propulsion of exhaled droplets that land in the noses and mouths of individuals nearby. However, the updated two-page explanation provided little new guidance on how to protect against airborne transmission. "There is growing evidence that droplets and airborne particles can remain suspended in the air and be breathed in by others and travel distances beyond six feet (for example, during choir practice, in restaurants or in fitness classes)."Įxperts on aerosols and the coronavirus said the change constitutes a profound shift in understanding of how the virus that has claimed almost 200,000 lives in the United States spreads. "This is thought to be the main way the virus spreads," the CDC has posted on its website. The smaller particles, known as aerosols, are produced when an infected person coughs, sneezes, sings, talks or breathes and can be inhaled into someone's nose, mouth, airways or lungs, according to the CDC, which says that, in general, indoor settings without good ventilation increase the risk of contagion. The coronavirus spreads most commonly in the air, through droplets or other tiny respiratory particles that apparently can remain suspended and inhaled, the Centers for Disease Control and Prevention says in new guidance. Researcher Tehya Stockman plays a clarinet in a lab at the University of Colorado Boulder to measure aerosol output.
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