Civilian masks generally can not prevent the virus, can only prevent the wearer from inhaling airborne dust and haze and other particulate matter, medical surgical masks and N95 masks can effectively prevent the virus, in addition, should also pay attention to the correct wearing of masks in order to effectively prevent the virus. Civilian masks are generally made of cotton or gauze, relative to the virus, the material pore size is larger, so there is no anti-virus effect, can only prevent the air in the dust and haze and other particulate matter, medical surgical masks and N95 masks can prevent the virus. Medical surgical masks are made of polypropylene nonwoven fabrics, usually has a three-layer structure, inside and outside the two layers of spunbond nonwoven fabrics, the middle layer of meltblown nonwoven fabrics, and therefore has an antiviral effect; N95 masks also have a three-layer structure, is composed of needle punched cotton, meltblown nonwoven fabrics, spunbond nonwoven fabrics, also has an antiviral effect. In addition, should also pay attention to the correct wearing mask to play a protective role, to distinguish between the inside and outside of the mask, there is a nasal seal on the side of the upper, wear should press the nasal seal, make it close to the bridge of the nose.