Rumor ID: Wearing multiple layers of masks does not provide better protection against novel coronavirus infections. Rumor analysis: As long as you can correctly wear qualified medical protective masks and medical general surgical masks, only one can achieve the protective effect. If you wear more masks easy to produce the following adverse effects: 1, wear multiple masks, masks on the air flow will produce a certain resistance, when the inspiratory resistance is too large, can make people produce dizziness, chest tightness and other discomfort. 2, special groups, such as children, the elderly, people suffering from respiratory and cardiovascular diseases, if wearing a mask too thick, too long, can occur in the absence of oxygen and other unexpected situations. Special tips: When the public wears the mask, if there is deformation, moisture or soiling, etc., resulting in reduced protective performance, it should be replaced. When wearing the mask should use clean hands, gloves or paper towels, which can make the mask basically uncontaminated.