China News Service, Shenzhen, November 27 (Sun Qiuxia, Zheng Xiaohong, Zhu Zuying) At the first China Health Technology Innovation and Development Conference held in Shenzhen on November 27, Zhong Nanshan, an academician of the Chinese Academy of Engineering, pointed out that the spread of the new crown virus in cold chain transportation is still Many scientific issues have not been resolved, including the source of the virus, the mode of transmission, the survival time of the virus, and the concentration of the outer packaging virus that can cause transmission.

  As the northern hemisphere enters winter, the global epidemic of new crown pneumonia has accelerated.

Recently, the positive nucleic acid detection rate of imported cold-chain food in my country has increased significantly. The scope of virus-contaminated imported materials has expanded from cold-chain food to containers, and the spread of the epidemic has shown the coexistence of "from object to person" and "from person to person".

  "There is a problem of material transmission in cold chain transportation. Is the source of the virus in a cold chain or a closed environment? Is the mode of transmission inhalation or contact? How long does the virus survive? What is the concentration of the outer packaging that can cause transmission? We don't know This requires us to continue to study." Zhong Nanshan said.

  Zhong Nanshan said that the winter has come this year, and there must be a detection method that can quickly identify whether it is influenza or new coronavirus.

The flu and the new coronavirus have the same protection methods. The flu has been greatly reduced this year.

  Zhong Nanshan also pointed out that wearing masks can effectively prevent transmission, and surgical masks and N95 masks can reduce the transmission of droplets and aerosols.

As for vaccines, he pointed out that the public must be vaccinated on a large scale, and it will take at least two or three years to find a good and really good vaccine.

  In addition, Zhong Nanshan also pointed out that "joint prevention and control" is still the key to the prevention and control of the new crown, and it is also a link in which our country has achieved more obvious success.