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ElliotSmith
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- TL;DR Summary
- Is COVID-19 aerosolized?
Is COVID-19 aerosolized like the flu and common cold? Or is it only transmitted through sneeze and cough droplets?
Marr is an aerosol scientist at Virginia Tech and one of the few in the world who also studies infectious diseases. To her, the new coronavirus looked as if it could hang in the air, infecting anyone who breathed in enough of it. For people indoors, that posed a considerable risk. But the WHO didn’t seem to have caught on. Just days before, the organization had tweeted “FACT: #COVID19 is NOT airborne.” That’s why Marr was skipping her usual morning workout to join 35 other aerosol scientists. They were trying to warn the WHO it was making a big mistake.
. . . the WHO’s advisers seemed to be saying those same laws didn’t apply to virus-laced respiratory particles. To them, the word airborne only applied to particles smaller than 5 microns. Trapped in their group-specific jargon, the two camps on Zoom literally couldn’t understand one another.
Linsey Marr installed air samplers in places such as day cares and airplanes, she frequently found the flu virus where the textbooks said it shouldn’t be—hiding in the air, most often in particles small enough to stay aloft for hours. And there was enough of it to make people sick.
In 2011, this should have been major news. Instead, the major medical journals rejected her manuscript. Even as she ran new experiments that added evidence to the idea that influenza was infecting people via aerosols, only one niche publisher, The Journal of the Royal Society Interface, was consistently receptive to her work. In the siloed world of academia, aerosols had always been the domain of engineers and physicists, and pathogens purely a medical concern; Marr was one of the rare people who tried to straddle the divide. “I was definitely fringe,” she says.
An airborne virus is one that can spread through the air, typically through tiny droplets that are released when an infected person talks, coughs, or sneezes. These droplets can travel through the air and potentially infect others who breathe them in.
This is a topic of ongoing debate among scientists. While there is evidence that COVID-19 can spread through the air, it is not yet clear if this is the primary mode of transmission. Some experts argue that the virus is primarily spread through larger droplets that do not stay suspended in the air for long periods of time.
Several studies have found that the virus can remain suspended in the air for a period of time, and can travel distances beyond the recommended 6 feet for social distancing. Additionally, outbreaks in indoor settings with poor ventilation have been linked to airborne transmission.
If the virus is indeed primarily spread through the air, it would have significant implications for public health measures such as mask-wearing and social distancing. It would also highlight the importance of proper ventilation in indoor spaces to reduce the risk of transmission.
Scientists are conducting further research and studies to better understand the transmission of COVID-19, including how the virus spreads through the air. This includes studying the size and concentration of viral particles in the air, as well as the role of ventilation and air filtration in reducing transmission.