On Monday, the U.S. Department of Disease Control and Prevention The centers abruptly reverted to the previous guide on how coronavirus is transmitted, which removed the language about airborne transmission posted a few days ago in the air.
NIAID
Color scanning electron micrograph of the infected apoptotic cell (pink) from the SARS-COV-2 virus particles (green) released from the patient’s sample. Image courtesy of NIAID Integrated Research Facility (IRF) in Fort Detrick, Maryland
“The draft version of the proposed changes to these recommendations was mistakenly posted on the agency’s official website. The CDC is currently updating its recommendations regarding airborne transmission of SARS-COVID-2 (the virus that causes COVID-19). CDC spokesman Jason MacDonald said in an email to CNN that after completion, the updated language would be posted.
Guidance on how the novel coronavirus is spread. While it is known that it is transmitted by drops to people less than a foot standing, research continues to find out how the virus is trapped in airborne particles in the air and infects people over 6 feet.
According to the agency’s website, the CBC Transmission Guidance acknowledges the acceptance of meteorological transmissions. CNN reported the first change on Sunday. The CDC responded to CNN just before noon Monday that it would turn to the previous guideline.
A federal official familiar with the situation said the change involved no political pressure.
This was the complete work of the CDC, the official said. “It was posted by mistake. It was not ready to be posted.”
The official said the guideline changes were published without a full review by CDC experts.
“Someone hit the button and it shouldn’t have happened,” the official said.
The agency sought to clarify what the aerosol transmission meant, the official said. It could happen, but the virus is not primarily a way to become infected, the official said. But in trying to say it, it was written in such a way that “it means he understands that he is more transmissible than we thought, which is not the case.”
The official added that the guidance is “improving”, but did not say when the update would be posted on the CDC’s website.
How the CDC’s guidance changed
Despite many studies showing the novel coronavirus to be spread by tiny particles in the air, the CDC page now says that Covid-19 is mainly transmitted by people in close contact – about 6 feet – and “by produced respiratory drops”. When an infected person coughs, sneezes or talks. “It’s the same language that the same agency posted months ago.
In a language posted on Friday and now removed, the CDC said Covid-19 is usually spread between people in close contact with each other, saying it is spread by respiratory drops or small particles, such as those in aerosols. Occurs when an infected person coughs, sneezes, sneezes, talks or breathes. “
“These particles can cause infections when inhaled into the nose, mouth, airways and lungs,” the agency said. “This is thought to be the main way the virus has spread.”
“There is evidence that drops and airborne particles can be trapped in the air and inhaled by others, and travel more than 6 feet (for example, during singing practice, in restaurants or in fitness classes),” Page said Friday. In the update, which has since been removed. “In general, indoor environments without good ventilation increase this risk.”
In Friday’s update, the CDC added new self-defense measures to others, including recommendations for using air purifiers to reduce aerated insects in indoor spaces and clear guidelines for “staying at least 6 feet away from others whenever possible.” The revised CDC page also changed the language surrounding asymptomatic transmission, replacing it with saying, “Some people without symptoms are capable of transmitting the virus,” adding that “infected people can spread the virus even if they do not show symptoms.” That language has now been removed.
Scientists were forced to accept airborne transmission
Many researchers and doctors have been saying for months that the coronavirus is spread by small airborne viral particles. In July, 239 scientists published a letter urging the World Health Organization and other public health organizations to be more forthcoming about the possibility of people catching the virus from drops floating in the air.
Donald Milton, author of the letter and professor of environmental health at the University of Maryland, said he was “encouraged” when he saw the revised CDC guidance over the weekend, but said he doubted it was a work in progress ever since. The rest of the CDC was not updated to reflect the site changes.
“I think the science behind what happened in the draft statement is strong and agrees with my understanding of the data.” “I am delighted to learn that the CDC is working on incorporating the latest science into its public statements about transmissions. Today, we know a lot about aerosols and how to control them to prevent transmission.”
While the United States awaits the CDC’s final advice, the world is not waiting to find a way to stop the spread of the disease, said Dr. Mike Rhean, executive director of the World Health Organization’s Health Emergency Program.
“Based on the evidence, [WHO] “He believes there are a wide range of transmission modes.” We believe that the disease is spread primarily or primarily by the spread of droplets and by large dot structures. But we’ve always said that a small dot-nucleus can spread the disease – and that’s very relevant. “
Ryan explained that people who are in a small building area with poorly ventilated are infected by aerosol-based transmissions. “It’s about knowing the risk and managing the frequency, intensity and duration of time spent for others in crowded spaces,” he said.
Ryan added, “We’ve been able to accept that there’s a lot less absurdity in this reaction.” “We’ve been able to be smart, and make smart decisions based on understanding risk, reducing risk, and then being aware of the remaining risks. Smart decisions are made, and we can avoid that.”
Concerns about political pressure
Some were concerned that the quick updates from the CDC could be linked to earlier reports of political pressure and interference in the agency.
On Friday, the CDC updated its coronavirus testing guidelines to stress that anyone who comes in contact with an infected person should be tested for coronavirus. Earlier, the controversial update was not written by CDC scientists and was posted online before the general scientific review process was passed, two sources confirmed to CNN last week.
CNN also reported last week that U.S. health and human services communications officials were forced to change the language of the weekly science reports released by the CDC so as not to undermine President Donald Trump’s political message, a federal health official told CNN. Dr. Robert Redfield, director of the CDC, said last week that “there is no scientific integrity to these reports at any time.”
On Monday, George and Washington Washington University emergency physician and CNN medical analyst Dr. Le. Liana Wayne said she was concerned that a sudden change in CDC guidance could be motivated by politics rather than science.
“The fact that they moved on, despite this general scientific knowledge at the time, makes one wonder what is behind this,” he said. “Was there political pressure? Political interference that drives this rather than science?”
“Science should always run politics in the CDC,” he said.
“It’s not about politics,” Wayne said. “It’s not about what feels good. It’s about following the science so we can reduce the number of infections and deaths.”
Regardless, the CDC’s counterattack confuses people – and hinders mitigation efforts that can be put in place.
“It’s very confusing, and that kind of whiplash – especially without the CDC’s direct explanation – creates confusion and unfortunately the CDC lacks overall confidence,” Wayne said.
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