Chinanews.net client, April 8 (Zhang Ni) The new coronary pneumonia epidemic is spreading around the world. Outside of China, many countries are engaged in heated discussions about whether the public should be encouraged to wear masks. A few days ago, WHO issued a document to remind the public that the operation of wearing a mask alone is not enough to contain the virus. The article said that if you wear a mask, you must also take other protective measures, including frequent hand washing, disinfecting the surface of the object and so on. People must learn how to wear and remove masks correctly. It is obviously not enough to operate strictly in the correct way.