US CDC backtracks on airborne transmission

US CDC backtracks on airborne transmission

This is a point that many independent experts have also been advancing, and it had appeared that the agency had come around to their point of view. "Once this process has been completed, the update language will be posted", the CDC stated Monday. "There is significant potential for inhalation exposure to viruses in microscopic respiratory droplets [microdroplets] at short to medium distances [up to several meters, or room scale], and we are advocating for the use of preventive measures to mitigate this route of airborne transmission".

The health agency had said COVID-19 could spread through airborne particles that can remain suspended in the air and travel beyond six feet.

"In general, indoor environments without good ventilation increase this risk", the guidance read.

The now-deleted updates were notable because so far the CDC has stopped short of saying that the virus is airborne.

"They changed it and did not tell anyone", he said.

Earlier this month, US President Donald Trump took exception to comments from the CDC director, who said masks might be even more effective than a vaccine for the novel coronavirus that could be broadly rolled out in mid-2021.

"While the current (coronavirus) specific research is limited, the results of available studies are consistent with aerosolization of virus from normal breathing", according to the letter, written by Dr. Harvey Fineberg, former dean of the Harvard School of Public Health, CNN reported.

The website has been changed back to their previous guidance which states COVID-19 is believed to be transferred through larger droplets through close contact, closer than six feet, with a person who coughs, sings, or otherwise expels these larger droplets carrying the virus. So far, he said, the agency's scientists have said the virus is transmitted through the air when droplets are fired from a person's mouth or nose in the form of a projectile, directly infecting another person.

In interviews, CDC officials have also acknowledged growing evidence that the virus can in some cases also spread via even smaller, aerosolized particles or droplets that spread over a wider area.

Since the pandemic began, arguments have raged over how the virus travels - and how to best halt it. But the CDC soon concluded that person-to-person transmission was a much more pressing threat. "In general, the more closely a person with Covid-19 interacts with others and the longer that interaction, the higher the risk of Covid-19 spread", it said.

For months, scientists have been speculating about the possibility of the corona virus spreading through virus particles in the air, and have pushed health organizations to admit it.

Milton and Jimenez were among a team of researchers who wrote an open letter to the World Health Organization, which eventually signed 239 researchers from 32 countries, who called on officials to accept the possibility that aerosols could play an important role in spreading the virus.

Dr. Abraar Karan, a physician at Harvard Medical School working on the COVID-19 response in MA, tweeted that CDC deeming aerosols one of the "common routes of spread" of the virus" was "a significant shift. Most CDC guidance about social distancing is built around that idea, saying that 6 feet is a safe buffer between people who are not wearing masks. "Cloth masks are not created to block aerosols".

The CDC has also updated the information on how to protect yourself from covid to include, "stay at least 6 feet away from others, whenever possible, " so the rule of social distancing remains crucial.

Such documents are a primary way CDC now communicates with the American people.

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