In recent days,
Novel Coronavirus infected with pneumonia
Keep everyone concerned about how to prevent infection
Among the many precautions
A particularly important one is "Wear a mask"
Many hospitals are reported to have handed out masks
Experts are also recommending wearing masks as a routine measure of protection
But there are a few problems
What kind of mask can prevent infection?
How to wear a mask correctly?
How can You prevent infection if you don't have a mask?
How many types of masks are there?
There are three common types of masks
Ordinary cotton masks, disposable masks, N95 masks
(1)Plain cotton face mask
The material is cotton cloth, gauze, wool, canvas and velvet, etc., because the material itself is not dense enough to play a role in preventing infection.
(2)Disposable masks (surgical masks)
Can prevent respiratory tract infection to a certain extent, unable to prevent haze.