Controversy about N95 mask breathing valve

There are two types of valves, the exhalation valve and the inhalation valve, collectively called the breathing valve. For manufacturers who specialize in protective products, it is normal to use breathing valves in general.

The suction valve is more commonly used in mask type. Ordinary masks are too airtight because of grade 90 and 95 masks, and the wearing experience is bad. In order to take care of people with respiratory diseases such as frailty, rhinitis, elderly and pregnant women, a one-way outlet valve is added to let the exhausted air flow out quickly and avoid the wearer from repeatedly inhaling the exhaust gas discharged by himself. Specifically, if you have rhinitis around you, just ask. If the mask does not have an exhalation valve, it feels painful to wear it.

So, can I wear an exhalation valve? Of course it can, because it is also produced according to the same standard, and the filtering effect is the same as without the exhalation valve.

Why does this kind of mask work, because how small is the coronavirus? You must use an electron microscope to see that the diameter is only about one ten-thousandth of a millimeter. In other words, if you pull out your hair and cut it, you can put 700 coronaviruses on the diameter. It floats in the air, you can flick your finger, it can fly without a trace. So if it wants to be infected, in addition to direct contact, it is through droplets. When two people talk face-to-face, you don’t feel it, but in fact the subtle saliva has already flown to the other person’s face with the virus.

So we have to wear masks and isolate them directly. The virus does not have the ability to move autonomously in the outside world. Even if it is outside your mask, as long as you don’t touch it or lick it, it can’t get in. Even if it is next to the exhalation valve, watching the valve open and close. The virus faces the venting wind speed, just as helpless Monkey King faces the banana fan without setting the wind beads. However, science is rigorous, so no scientist dares to say that viruses must not enter through the valve. Even if it is N100, no one dares to pack a ticket and say that it will be protected.