Filenews 14 August 2020
Valve masks do not prevent the transmission of the coronavirus from those who wear it to other people. People should wear masks to "brake" the spread of Covid-19 disease caused by SARS-CoV-2 coronavirus, but these should not have a valve, the US Centers for Disease Control and Prevention (CDC) said in a new statement.
Valve masks are usually used in construction projects and other operations, allowing users to inhale filtered air and exhale warm moist air through the valve, which reduces heat and humidity inside the mask.
Thus, the mask becomes more comfortable and can be worn for a long time, without causing discomfort. But the valve mask is not suitable for an epidemic because it does not help prevent the transmission of a virus.
In the era of Covid-19 the use of a mask is necessary to prevent droplets from being ejected from a carrier of the virus, either symptomatic or asymptomatic, and not to travel in the air, in which case they may infect other people. The ejection of droplets is done not only by coughing or sneezing, but also simply by speaking. But when the mask has a valve, it does not prevent droplets from being diffused into the air and then inhaled by unsuspecting people, especially those who move around without a mask. That's why medical masks don't have a valve.
Many airlines have already banned their passengers from wearing a valve mask, most recently American Airlines announced it would do so from August 19.
Source: eyenews/KYPE
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