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.