How long will the mask last

The novel coronavirus pneumonia novel coronavirus pneumonia prevention and control has achieved some results. Professor Zhang Wenhong, head of clinical treatment expert group of Shanghai new crown pneumonia, suggested that we should maintain high vigilance against epidemic situation, and we must not hold large scale gatherings. Professor Zhang said: “this state may be maintained for another one to two months. At that time, there was no new one. Basically, we can take off the mask. “