Does everyone usually wear masks?
Winter is good for prevention of a cold.
I wonder if I can usually do it.
Here we will look at the mask made of paper. First of all, do you think that masks can prevent pathogens of any size?
Well, can not you prevent any pathogens?
In a box of a certain mask, "PFE 97%" was written. PFE is "polystyrene fine particle blocking effect experiment". Simply put, it is a very small (0.1 micrometer) grain of polystyrene, which is a test to see how much grains do not pass.
In other words, if you want to kill pathogens of 0.1 micrometer, 97% can block out.
The 0.1 micrometer is about 1 / 800th of the average hair thickness, influenza virus is about 0.08 micrometer ~ 0.12 micrometer, and it seems to be expected to some extent .
In other words, it can be prevented from many pathogens, but it is not completely preventable.
Also, when you put on a mask, if a gaps are formed between the mask and the face, you will be able to enter the pathogens from there. It is also important that you do not make gaps between the mask and face as much as possible.