The Knowledge Of Mask

o which masks are effective against the new coronavirus?

Masks can be divided into four categories according to their use:

(1) ordinary gauze mask;

(2) medical (protective or surgical) mask;

(3) daily protective masks (mainly used to prevent haze, such as N95, KN95, etc.);

(4) dust respirator, lampblack respirator (respirator, mainly for occupational protection).

In addition to ordinary gauze masks, other masks have a good protection against new coronavirus.