Prevention of the new coronavirus requires a medical surgical mask or a medical N95 mask.
Medical surgical masks have three layers of protection, which are made up of a filter layer, a mask strap and a nose clip. In daily life you can wear a medical surgical mask for prevention, the outer layer can block bacteria, prevent droplets, bacteria into the mask, the middle layer plays the role of filtration, filtering airborne bacteria, viruses, sand and dust, etc., close to the nose and mouth of the inner layer can absorb moisture, effective absorption of carbon dioxide produced by the nose exhalation of moisture in daily life can be used for the prevention of influenza, respiratory system and other infectious diseases spread.
Hospitals, epidemic prevention departments or engaged in testing staff recommended to wear the use of medical N95 masks, this mask protection is tight, can filter about 95% of the air bacteria, viruses, etc., effective protection of the respiratory system. But after a long time wearing will have obvious suffocating feeling, because the breathing resistance is too large, will affect the human respiratory function by resistance.
Medical surgical masks and medical N95 masks are recommended to wear time not more than four hours, wearing time is too long will reduce the mask’s defense role.