Strong Evidence Covid Predominantly Spreads Through Air: Lan
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A new assessment has found consistent, strong evidence that the SARS-CoV-2 virus, which causes COVID-19, is predominantly transmitted through the air. Therefore, public health measures that fail to treat the virus as predominantly airborne leave people unprotected and allow the virus to spread, according to six experts from the UK, USA and Canada.

The team of experts identified 10 lines of evidence to support the predominance of the airborne route. At the top of their list: Super-spreader events such as the Skagit Choir outbreak, in which 53 people became infected from a single infected case. Studies have confirmed these events cannot be adequately explained by close contact or touching shared surfaces or objects.

Transmission rates of SARS-CoV-2 are much higher indoors than outdoors. Silent transmission from people who are not coughing or sneezing accounts for at least 40 percent of all transmission. The researchers also cited work demonstrating long-range transmission of the virus between people in adjacent rooms in hotels; people who were never in each other's presence.

By contrast, the team found little to no evidence that the virus spreads easily via large droplets, which fall quickly through the air and contaminate surfaces. Researchers were able to identify and interpret highly complex and specialist papers on the dynamics of fluid flows and the isolation of live virus.

The new work has serious implications for public health measures designed to mitigate the pandemic. First, droplet measures such as handwashing and surface cleaning, while not unimportant, should be given less emphasis than airborne measures, which deal with inhalation of infectious particles suspended in the air. Airborne control measures include ventilation, air filtration, reducing crowding and the amount of time people spend indoors.

People can potentially be infected when they inhale aerosols produced when an infected person exhales, speaks, shouts, sings or sneezes. "It is quite surprising that anyone is still questioning whether the airborne transmission is the predominant transmission pathway," co-author says. Once we acknowledge this virus is airborne, we know how to fix it, she says. "The world needs to follow their lead as soon as possible," she adds.

Dr. S●●●●y M●●●●●●●●i
Dr. S●●●●y M●●●●●●●●i Internal Medicine
It' s just that surface transmission by touching and all is not very significant and sanitizers and handwashing may not help much. Rather transmission is much more in closed unventilated or poorly air-conditioned spaces leading to increase chances of family transmission. Try to avoid ill-ventilated spaces and start wearing a mask at home so your family will not get it from the clothes you wear in the ward but from you if you are asymptomatically infected.... Read more
Apr 16, 2021Like1