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PT KCI is intensively socializing to KRL users to avoid using buff and scuba masks. "Avoid using scuba masks or buffs which are only 5% effective in preventing the risk of exposure to dust, viruses and bacteria," wrote Instagram @commuterline.
Health experts around the world advise everyone, both sick and healthy, to always wear a mask when they are outside the home. Because it is proven to prevent someone from being exposed to the virus.
However, not all types of masks are able to provide effective protection. There are several types of masks that are very effective at preventing virus transmission, such as N95 mask and surgical mask that are often used by health workers. In addition, there are also several types of masks that are less effective in providing protection from exposure to viruses. In fact, its use can actually make someone potentially infected with the virus.
The following are three types of masks that are ineffective at preventing the transmission of coronavirus, compiled from various sources.
According to a study from the University of Duke, buff offer very little protection from exposure to the Coronavirus. The study tested 14 types of masks, and buff is the most ineffective in blocking droplets when someone speaks.
Buff also make the wearer emits more droplets than when not wearing a mask at all, because the materials used can break down the droplets into smaller particles.
"You can imagine that you have this big particle, it hits a fiber and it explodes and you make lots of small particles," said Martin Fischer, a chemist and physicist at Duke who led the work.
2. Non-cotton Cloth Masks
Apart from buff, types of masks that are less effective in providing protection are knitted mask and bandana. Although these two may look unique, but the materials used do not offer much protection.
Reporting from Detik.com, pulmonologist from RSUP Persahabatan, dr. Diah Handayani, SpP, said that non-cotton cloth masks may have big pores, not as tight as those cotton cloth mask. Three-layer cloth mask made of cotton is said to be better for everyday use because they have tight pores.
In addition, scuba mask is also considered unable to provide as much protection as cotton cloth mask. This is because the material is thin enough that the protection level is pretty low.
3. Valve Mask
The Centers for Disease Control and Prevention (CDC) advises people not to use exhaust masks or masks that have ventilation and valves. Because these types of masks allow air to get out more easily through the valve hole.
"Mask with valves or breathing vents should not be used to help prevent people wearing mask from spreading COVID-19 to others," wrote the CDC on its official website.