Original title: What kind of mask can prevent the novel coronavirus? Yesterday, the National Health Commission issued announcement No.1! With the approval of the State Council, the State Health Commission has decided to incorporate pneumonia infected by new coronavirus into the Category B infectious disease stipulated in the Law of the People's Republic of China on Prevention and Treatment of Infectious Diseases, and to take Category A infectious disease of preventive and control measures. In the face of the epidemic, everyone is concerned about: How can I prevent it? Among the many preventive measures, a particularly important one is "wearing a mask". So, what kind of mask can prevent infection? How to wear a mask correctly? What should I do if I can't buy a mask? 01 What kind of mask is appropriate? At present, the main masks you can see on the market are: medical protective masks with the highest protection level (such as N95), surgical mask commonly used in invasive operating environments such as operating rooms, and disposable medical masks of ordinary level. In addition, there are cotton masks, sponge masks and other "net red masks" worn by various stars. Medical respirator (N95) N95 mask is one of the nine particulate masks certified by NIOSH (National Institute for Occupational Safety and Health), which can prevent droplet transmission caused by patients. Expand the full text There are two kinds of common N95 mask, one with breather valve and the other without breather valve. Breathing valves are considered to be less protective against viruses, while those without breathing valves are less breathable, more laborious to breathe, and should not be worn for a long time. When you buy, you can choose according to the actual situation. N95 is not a specific product name. As long as the product meets the N95 standard and passes the NIOSH review,KN95 Mask for Epidemic Prevention and Control, it can be called "N95 mask". In particular, it should be reminded that the "bacterial filtration ≥ 95%" indicated in the packaging of some brand masks is not equal to the "N95 protection level". In addition, there is no so-called 3m standard mask, 3m is only a mask brand, not all 3m masks can meet the N95 protection level. (Photo: Doctor Do of Union Medical College) surgical mask Surgical mask is a medical mask commonly used in operating rooms and other environments with the risk of body fluid and blood splashing, which can prevent blood and body fluid from passing through the mask to contaminate the wearer. At the same time, the filtering efficiency of bacteria should not be less than 95%,Against Bacteria Breathable KN95 Face Mask, but the filtering efficiency of particles is limited, and most of them are rectangular design, so the tightness with the face is not as tight as that of medical protective masks. When purchasing, we must pay attention to the masks with the words "surgical mask" or the implementation standards. The latest executive standard of surgical mask is the pharmaceutical industry standard of the People's Republic of China, Technical Requirements for surgical mask, YY-0469-2011, which was issued on December 31, 2011 and implemented on June 1, 2013. Disposable medical mask There are many names of ordinary medical masks, and the medical masks without the words "protection" and "surgery" on the name are all ordinary medical masks. This level of mask is generally not required to have a barrier effect on blood, so it is only used in general medical environment. The current industry standard for ordinary medical masks is Disposable Medical Masks YY/T 0969-2013. Ordinary mask Ordinary masks may be made of cotton cloth, gauze, sponge, Virus Prevention Mask 3 Ply with Earloop ,CE Certificate KN95 Mask, canvas and velvet, because the material itself is not dense enough to prevent infection. As for how to choose, first of all, at a press conference on the prevention and control of the "pneumonia epidemic infected by the new coronavirus" yesterday afternoon, Academician Zhong Nanshan said: "It is not necessary to wear N95, because these viruses do not actually exist alone, they often exist in droplets. General masks, surgical masks and so on can still block most of the viruses with droplets from entering the respiratory tract. Although from the point of view of protective effect alone, N95 mask has the strongest protective effect, followed by surgical mask, and then ordinary medical masks. However, N95 mask, there are also some actual situations, such as uncomfortable use, difficult purchase and high price. Therefore, there is no need to snap up the N95 that can not be worn, which is equal to wearing in vain. If you go to general open-air public places and do not contact with patients, you can choose to wear surgical mask without excessive protection, but if you will contact patients suspected of respiratory tract infection, you should wear N95 masks. 02 How to wear a mask correctly? How to wear N95 respirator Wearing method of medical surgical mask 03 What should I do if I can't buy a mask? In fact, in addition to masks and medicines, we can take the following measures to prevent infection during the Spring Festival: 1. If not necessary, try to avoid going to crowded and airtight public places. Because even in the season of pneumonia epidemic, it is possible to catch pneumonia by staying in the crowd for too long; 2. Wash hands frequently, use soap and hand sanitizer to clean hands before meals and after defecation or touching public articles; change and wash clothes worn outside in time after returning home. 3. Keep the environment ventilated. Open more windows at home to keep the air circulating for about 30 minutes each time. 4. Strengthen exercise and improve self-immunity. Spring Festival gatherings should be restrained, and immunity should not be reduced due to excessive staying up late and fatigue, which will increase the risk of self-infection! 04 How often do you need to change the mask? In order to prevent infection, some people may wear medical masks all day long, but this will make the nasal mucosa fragile, lose the original physiological function of the nasal cavity, and reduce resistance. Therefore, in places with low population density and good ventilation, it is not necessary to wear masks. It should be reminded that the protective effect of any type of mask is time-limited and must be replaced regularly. It is recommended to replace the mask every 2 to 4 hours. If the mask is contaminated, it should be replaced at the first time. All masks are disposable and are not recommended for reuse. Discard N95 mask if damaged or deformed. That is: no longer forms an effective seal on the face; becomes wet or visibly dirty; becomes more difficult to breathe; or becomes contaminated with blood, respiratory or nasal secretions, or other bodily fluids of the patient, all need to be discarded. 05 How to wear masks for special groups? When pregnant women wear protective masks, they should pay attention to their own conditions and choose products with better comfort. Before wearing, you should consult a professional doctor to confirm that your physical condition is suitable. The elderly and patients with chronic diseases have different physical conditions, such as patients with heart and lung diseases will cause discomfort after wearing, and even aggravate the original condition,KN95 Face Mask, these people should seek professional guidance from doctors. Children are in the stage of growth and development, and their faces are small. It is generally recommended that children who are too young wear masks. If necessary, they should choose special protective masks for children produced by regular manufacturers. Return to Sohu to see more Responsible Editor:. zjyuan-group.com