[Commentary] On April 23, the State Council Joint Defense and Joint Control Press held a press conference. Shi Yi, a researcher at the Institute of Microbiology of the Chinese Academy of Sciences, said that no signs of long-term infection with new coronaviruses have been observed, and no evidence of immunological and virological studies on the chronicity of new coronary pneumonia has been obtained.
[Same period] Shi Yi, researcher, Institute of Microbiology, Chinese Academy of Sciences
From the current research and clinical practice, it is known that the new coronavirus mainly replicates in the respiratory tract, and chronic carrying is unlikely. From the two coronaviruses of its kind, such as the two coronaviruses that cause SARS and the Middle East Respiratory Syndrome, no persistent infection has been observed. From the perspective of tens of thousands of new crown recoverers in China, no long-term infection has been observed. Signs. Therefore, current knowledge believes that the possibility of long-term infection of individuals after being infected with the new coronavirus is extremely small, and there is no evidence of immunological and virological studies to prove their chronicity at this stage.
[Explanation] Shi Yi said that the new coronavirus is a brand new virus, and human knowledge of it is still deepening. He believes that the new coronavirus may be normalized and spread like the flu virus, but the probability of occurrence is very low.
[Same period] Shi Yi, researcher, Institute of Microbiology, Chinese Academy of Sciences
Influenza viruses have the characteristics of high variability and high infectivity. For example, people will be immune to influenza this year, but next year, influenza viruses may mutate and produce new strains, leading to re-epidemics. At present, it is not found that the new coronavirus has such high variability of influenza virus, so the possibility of normalization is not very high.
[Explanation] Talking about whether the epidemic of the new crown pneumonia will be contained as the temperature rises, Shi Yi pointed out that in terms of the mode of transmission, the transmission method of the new crown virus is less affected by the temperature, and it needs further observation whether it is contained.
[Same period] Shi Yi, researcher, Institute of Microbiology, Chinese Academy of Sciences
The new coronavirus is mainly spread through droplets and direct contact. Relatively speaking, this mode of transmission is less affected by temperature, and we also note that the countries in the southern hemisphere are currently in summer and autumn, the weather is relatively hot, but the new crown epidemic It continues to happen, and the final situation requires further observation.
[Explanation] In response to the claim that some people in the United States suspect that the US military Fort Detrick Biochemical Research Base may be the source of the new coronavirus, Shi Yi said that virus tracing is a scientific issue, and currently hopes that countries in the world will focus on epidemic prevention and control.
[Same period] Shi Yi, researcher, Institute of Microbiology, Chinese Academy of Sciences
From the perspective of the entire scientific research process of virus tracing, this is a scientific problem that takes a long time and there is uncertainty. It is necessary to gather a lot of biological information and epidemiological evidence into a mutually validated evidence chain to truly complete task. The current epidemic situation of new pneumonia is raging all over the world. I hope all countries in the world will focus their energy and attention on the key work of epidemic prevention and control.
[Explanation] May 1st is approaching, can people travel? At the press conference, relevant experts said that for most areas where there is no recent case report, it is still safe to travel, but personal protection is required during the trip.
[Same period] Feng Luzhao, researcher of China Center for Disease Control
For most areas where there is no recent case report, it is relatively safe to travel, but in view of the fact that there are still new overseas imported cases or local cases every day, we must remain vigilant and realize that there is still a risk of contracting new coronary pneumonia . Traveling is not recommended for some high-risk groups such as the elderly, patients with chronic diseases, and pregnant women. Pay attention to prevention for travel personnel.
Reporter Liu Chao from Beijing
Editor in charge: [Wang Kai]