The cone sucks everything out of their mouths and noses. It’s part of a device called “Gasundite II” that helps scientists study one big question: How does the COVID-19 virus just spread from one person to another?
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It clearly moves on small liquid particles sprayed by an infected person. People expel particles when coughing, sneezing, singing, screaming, talking and breathing. But the drops come in different sizes, and scientists are trying to pin down just how dangerous the different types are.
The answer affects what we should all do to avoid getting sick. That’s why a few days ago when the US health agency seemed to have changed its position on the issue, but later said that it had mistakenly published a new language.
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The recommendation to stay at a distance of at least 6 feet (2 meters) – some officials cite about half of this distance – is based on the idea that large particles can go very far before they fall to the ground. They are like drops of spritz from a window cleaner, and they can infect someone’s nose, mouth or eyes by inhaling or inhaling.
But some scientists are now focusing on thinner particles, which spread more like cigarette smoke. It is caused by the warmth of our body through the air cells and the drafts above. They linger in the air for minutes to hours, spread throughout the room and can form if ventilation is poor.
The potential risk is breathing them. Measles is spread this way, but the new coronavirus is much less contagious than that.
For these particles, known as aerosols, “6 feet is not a magical distance,” says Lancey Merr, a leading researcher who studied them at the Virginia Tech in Bloomberg. But he says it’s still important to keep your distance from others, “better,” because aerosols are more concentrated near one source and pose a greater risk at closer distances.
Public health agencies have generally focused on larger particles for coronavirus. Which asked more than 200 other scientists to publish a petition in July to address the potential danger of aerosols. The World Health Organization, which has long ruled out the risk of aerosols without certain medical procedures, later said that aerosol transmission of the coronavirus could not be ruled out in cases of infection within congested and poorly ventilated areas.
U.S. Department of Disease Control and Prevention The issue came to the fore recently when the centers posted statements highlighting the idea of aerosol spread on its website and then deleted it. The agency said the posting was an error and the statements are just a draft of the proposed changes to its recommendations.
Dr Jay Butler, CDC’s deputy director for infectious diseases, told the Associated Press that the agency said large and heavy drops that come from coughing or sneezing are the primary means of transmission.
Butler said at a scientific meeting last month that current research suggests it is possible to spread an aerosol of coronavirus, but people do not think this is the main way to get infected. Further research could change that conclusion, and he urged scientists to study how often coronavirus aerosol spreads, what circumstances make it more probable, and what reasonable steps can be taken to avoid it.
Murray said he thinks infections by aerosols are “happening a lot more than people initially thought.”
As part of the evidence, Mar and others point to so-called “superspider” events where an infected person transmitted the virus to many people in the same setting.
In March, for example, after attending a rehearsal for a choir member with coronavirus symptoms in Washington state, room 2 others who were sitting in the entire room became infected and two people died. In a crowded and poorly ventilated restaurant in China in January, the virus was apparently spread by lunchtime patrons to five people on a two-sided table in a pattern indicating an aerosol by the virus. Also in January, a passenger on a Chinese bus apparently infected 23 people, many of whom were scattered around the vehicle.
Butler said such incidents are worrying about the spread of aerosols but do not prove it happens.
There may be another way to disperse smaller particles. William Ristonpart of the University of California at Davis said they may not come straight from anyone’s mouth or nose. Their research found that if paper tissues are seeded with the influenza virus and then crushed, they release virus-tolerant particles. Therefore, people with a covid-19 should be sure to wear a mask when disposing of discarded tissue waste, he said.
Scientists warning about sci rosols say the current recommendations still make sense.
It’s still important to wear a mask, and make sure it fits the snail. Keep washing your hands diligently. And again, these would mean that you have to spend for these processes. Avoid crowds, especially indoors.
Ventilation is one of their main recommendations to avoid the formation of aerosol concentrations. Therefore, researchers say, stay away from ventilated rooms. Open the windows and doors. Anyone can use air-purification devices or virus-inactive ultraviolet light.
Best: Just do as much as you can outside, where dilution and the sun’s ultraviolet light work in your favor.
“We know that outdoor space is a wonderfully effective step,” says Jose-Louis Jimenez of the University of Colorado-Boulder. “It’s not impossible to get infected from the outside, but it’s difficult.”
Researchers say different precautions should be used in combination rather than just one at a time. In a well-ventilated environment, “6 feet (separation) is great if everyone has got a mask” and no one will stay directly down the infected person for too long, said Dr. Maryland School of Public Health. Says Donald Milton. , Whose lab has a Gasandhite II machine.
The duration of exposure is important, so there’s probably no greater risk when passing a jogger on the sidewalk or masking a short elevator ride, experts say.
Scientists have published tools online to calculate the hazardous atmosphere hazard in various settings.
However, at a recent meeting about aerosols, Ge George Benjamin, executive director of the American Public Health Association, noted that preventive measures in the real world can be a challenge. It can be difficult to stay away from others in homes with many generations. Some older buildings have windows that had “nails closed years ago.” And “We have so many communities where they don’t even have access to clean water to wash their hands.”
While it would seem strange for all the scientific prowess to study the new coronavirus, the details of how it spread nine months later may still be in doubt. But history suggests patience.
“We’ve been studying influenza for 102 years,” says Milton, referring to the 1918 flu pandemic. “We still don’t know how it was transmitted and what the role of aerosols is.”
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