Western airlines, one after another, prohibit the use of a mask with valves during the flight. Russian airlines have not yet voiced such bans.
“Exhalation valve respirators, while they look more solid and reliable, are actually not. It is the exhalation valve, thanks to which it is comfortable for a person to breathe in such a respirator, that makes wearing it useless. The valve closes the opening during inhalation, and opens during exhalation. Thus, the air passes through the filter material and is cleaned of impurities. Accordingly, the person himself in such a respirator will be more or less protected (although far from 100%), but if he is a source of infection, then his viruses will freely enter the air, "explains the principle of operation of such a mask disinfectologist Nikolay Dubinin...
In his words, fabric products of all kinds of colors can also be meaningless: after all, these protective equipment do not belong to medical products and have not passed any tests.
During air travel, the expert advises to wear medical masks (three-layer, non-woven base), or surgical 4-layer medical masks. “At the same time, it is very important to put them on correctly, that is, with washed hands, pull them over the nose and chin, fix them on the bridge of the nose,” explains Dubinin. - Size is also important. For example, adult masks will not be able to protect a child because they will not be able to fit snugly against the face. And another important point, the mask should be worn no more than 2 hours, and then it needs to be replaced with a new one. When worn for a long time, such a remedy itself becomes a breeding ground for microbes. It is also very important to remove the mask correctly, holding it only by the strings, without touching the fabric itself. And then be sure to wash your hands with soap and water. "
You can also fly in respirators. “They are more reliable. If a mask, simply speaking, protects others from you (in the event that you are sick), then a respirator can protect you, too, the expert explains. - Respirators fit better to the face - this is their main advantage over masks. N95 respirators can be considered effective against viruses, according to the US Centers for Disease and Control. In Russia, they correspond to products of categories higher than FFP1. That is, respirators FFP2 and FFP3. But, as studies have shown, they are not omnipotent either. The results of the study, which was published by the journal Physics of Fluids (USA), show that neither face screens nor respirators with valves interfere with the spread of the virus. Therefore, according to studies, FFP2 agents are not recommended for working with infected people or in the outbreak. For this, FFP3 respirators and goggles or even full face masks are used. "