Activated carbon masks have no preventive and control effect on the new coronary pneumonia, it is recommended to use medical surgical masks or particulate protection masks.
Medical surgical masks have an outer water-blocking layer, a middle filtering layer, and a bacterial filtering efficiency of not less than 30%, and a moisture-absorbing layer on the inner side near the nose and mouth, which needs to meet the YY0469 standard, with a filtering efficiency in line with KN90/95/100, N90/95/100, and FFP1/2/3 standards. Medical personnel engaged in treatment, incident site investigation, sampling and testing of disease control personnel, as well as hospital isolation area cleaning, security and other service personnel are required to take stricter protective measures when engaged in the prevention and control of the epidemic.