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Technology Coronavirus can spread through the air, updated CDC guidance acknowledges

03:45  21 september  2020
03:45  21 september  2020 Source:   cnn.com

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The United States Centers for Disease Control and Prevention updated guidance on its website to say coronavirus can commonly spread The CDC abruptly reverted to its previous guidance about how coronavirus is transmitted, after saying on Friday that coronavirus can spread through the air .

The CDC acknowledged what many scientists have been saying for months: that the novel coronavirus can spread through small airborne The CDC updated their guidance on Friday (Sept. 18) to say that the virus can be spread through aerosols, or small particles that can linger in the air

The US Centers for Disease Control and Prevention updated guidance on its website to say coronavirus can commonly spread "through respiratory droplets or small particles, such as those in aerosols," which are produced even when a person breathes.

This transmission electron microscope image shows SARS-CoV-2—also known as 2019-nCoV, the virus that causes COVID-19. isolated from a patient in the U.S., emerging from the surface of cells cultured in the lab. Credit: NIAID-RML © NIAID-RML This transmission electron microscope image shows SARS-CoV-2—also known as 2019-nCoV, the virus that causes COVID-19. isolated from a patient in the U.S., emerging from the surface of cells cultured in the lab. Credit: NIAID-RML

"Airborne viruses, including COVID-19, are among the most contagious and easily spread," the site now says.

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The Centers for Disease Control and Prevention abruptly removed information from its website saying that COVID-19 can spread through the air But the CDC and the World Health Organization (WHO) have been reluctant to acknowledge the role that tiny airborne particles might play in disease spread .

The Centers for Disease Control and Prevention issued a correction on its website Monday, saying a draft of proposed changes, including guidance on airborne transmission of Last Update 8 hours ago. CDC deletes coronavirus airborne transmission guidance , says update was 'draft version'.

Previously, the CDC page said that Covid-19 was thought to spread mainly between people in close contact -- about 6 feet -- and "through respiratory droplets produced when an infected person coughs, sneezes or talks."

The page, updated Friday, still says Covid-19 most commonly spreads between people who are in close contact with one another, and now says the virus is known to spread "through respiratory droplets or small particles, such as those in aerosols, produced when an infected person coughs, sneezes, sings, talks or breathes."

These particles can cause infection when "inhaled into the nose, mouth, airways, and lungs," it says. "This is thought to be the main way the virus spreads."

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Updated CDC guidance acknowledges coronavirus can spread through the air . A federal official familiar with the situation said there was no political How CDC 's guidance changed. Despite several studies that have shown the novel coronavirus can spread through small particles in the air , the

The U.S. Centers for Disease Control pulled new guidelines acknowledging the new coronavirus could be transmitted by tiny particles that linger in the air , saying a draft version of proposed changes was posted in error on the agency’s website. For months, the CDC said the new coronavirus is

"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 6 feet (for example, during choir practice, in restaurants, or in fitness classes)," the page now says. "In general, indoor environments without good ventilation increase this risk."

The CDC also added new measures to its information about protecting yourself and others.

Previously, CDC suggested maintaining "good social distance" of about 6 feet, washing hands, routinely cleaning and disinfecting surfaces and covering your mouth and nose with a mask when around others.

Now, it says "stay at least 6 feet away from others, whenever possible," and continues to direct people to wear a mask and routinely clean and disinfect. However, it also now says people should stay home and isolate when sick, and "use air purifiers to help reduce airborne germs in indoor spaces."

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CDC has updated its Covid guidance to make it clear that the virus is airborne. But the new guidelines, updated on Friday, acknowledge 'growing evidence' that the virus can be spread via very small Previously, the CDC advice said that coronavirus is spread ' through respiratory droplets

Coronavirus Disease 2019 (COVID-19) is most often spread from person to person among close contacts (about 6 feet). It appears that the virus that causes COVID-19 can spread from people to animals in some situations. CDC is aware of a small number of pets worldwide, including cats and

Masks, it notes, should not replace other prevention measures.

The update also changed language around asymptomatic transmission, shifting from saying "some people without symptoms may be able to spread the virus" to saying "people who are infected but do not show symptoms can spread the virus to others."

Scientists pushed for acknowledgment of airborne transmission

For months, scientists have noted the likelihood of coronavirus transmission through viral particles in the air, and pushed health agencies to acknowledge it.

In April, a prestigious scientific panel told the White House in a letter that research showed coronavirus can be spread not just by sneezes or coughs, but also just by talking, or possibly even just breathing.

"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 and chair of the NAS' Standing Committee on Emerging Infectious Diseases and 21st Century Health Threats.

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The Centers for Disease Control and Prevention said Monday it erroneously posted guidance saying the coronavirus spreads through airborne Studies have shown that the coronavirus could spread through aerosols in the air , and the WHO has said it is monitoring "emerging evidence" of possible

The Centers for Disease Control and Prevention ( CDC ) says it mistakenly published guidance suggesting that the novel coronavirus spreads through the air . It comes days after the CDC changed its controversial recommendations that people exposed to COVID-19 who are asymptomatic

"Currently available research supports the possibility that [coronavirus] could be spread via bioaerosols generated directly by patients' exhalation," the letter said.

And in July, 239 scientists published a letter that urged the World Health Organization and other public health organizations to be more forthcoming about the likelihood that people could catch the virus from droplets that were floating in the air.

"The current guidance from numerous international and national bodies focuses on hand washing, maintaining social distancing, and droplet precautions," scientists wrote in the letter, published in the journal Clinical Infectious Diseases.

"Most public health organizations, including the World Health Organization, do not recognize airborne transmission except for aerosol-generating procedures performed in healthcare settings. Hand washing and social distancing are appropriate, but in our view, insufficient to provide protection from virus-carrying respiratory microdroplets released into the air by infected people," they added.

After the letter published, WHO released a report that detailed how the coronavirus can pass from one person to another, including through the air during certain medical procedures and possibly the air in crowded indoor spaces.

On Sunday, one of the lead authors of the letter, Donald Milton, a professor of environmental health at the University of Maryland who studies how viruses are transmitted, said the CDC's new language was a "major improvement."

"I'm very encouraged to see that the CDC is paying attention and moving with the science. The evidence is accumulating," Milton wrote in an email to CNN.

He described a pre-print paper released in August -- in which scientists described culturing viable virus from air in a hospital -- as "an important addition to the reports of large outbreaks that were clearly a result of transmission by aerosols that travel more than 6 feet."

"It is time for WHO to acknowledge these advancements in the science," Milton said.

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