"We are now in a critical period of prevention and control ."

“For this new coronavirus, we have not identified the source of the infection and we are not clear about the risk of its mutation and how it spreads. Since this is a new coronavirus there might be some changes in the coming days and weeks, and the danger it poses to people of different ages is also changing.”

“From observations, the virus is capable of transmission even during incubation period. Some patients have normal temperatures and there are many milder cases. There are hidden carriers. There are signs showing the virus is becoming more transmissible. These walking "contagious agents" make controlling the outbreak a lot more difficult.”

“At present , the rate of development of the epidemic is accelerating. I am afraid that it will continue for some time, and the number of cases may increase.”