[Global Times reporter Guo Yuandan] the second wave of new epidemic in Japan is still not alleviated. Kyodo news agency said on the 9th that the number of newly diagnosed cases in Tokyo alone reached 331. To make matters worse, the latest study by the National Institute of infectious diseases of Japan found that the new coronavirus that has spread in Japan since June is a new coronavirus with new gene sequence after mutation. Will the mutated virus affect neighboring countries?
Japan’s Yomiuri Shimbun said that the first wave of epidemic in Japan in March this year was mainly caused by a new coronavirus with relevant gene sequence in Europe, and it has temporarily subsided in late May. However, since mid June, new coronavirus with new gene sequence appeared in Tokyo and spread to all parts of Japan. At present, a large number of confirmed patients in Japan are mostly infected with this variant virus.
Yang zhanqiu, a professor at the virology Institute of the medical department of Wuhan University, told the global times on the 9th that what Japan needs to know is where the mutated new virus comes from, that is, where it originated. Because the virus in the same environment mutation rate is very slow, usually in years, so Japan in a few months mutation virus, more likely from the external environment. Yang zhanqiu believes that foreign epidemic prevention and control management is relatively lax, and the mutated new coronavirus found in Japan is more likely to come from other countries, so Japan should conduct targeted research on this. This is similar to the outbreak in Beijing, which is not caused by the local virus strains, but is common in the major epidemic areas of Europe, which has not been prevalent in China before.
taolina, a vaccine expert, told the global times on the 9th that the new coronal vaccines developed are based on the virus strains isolated from December last year to January this year. At present, the strain has been mutated, but whether the vaccine needs to be adjusted still needs to be observed. He stressed that the key is whether the mutation site of the virus is the key site of the vaccine action, and there is no evidence that the mutation site is the vaccine action site. According to Tao Lina, the first generation of new coronal vaccine can be said to have been successfully developed by 80%. Even if the virus mutates, the new virus strain can be incorporated into the vaccine. In theory, it can be made into a multivalent vaccine like the cervical cancer vaccine and influenza vaccine.
another anonymous medical expert told the global times on the 9th that the fidelity of RNA polymerase is not high, so it is expected that RNA viruses (both coronavirus and influenza virus are RNA viruses) are prone to mutation. Generally speaking, there is no need to worry too much, because most of the variation of the virus will not lead to the change of its immunogenicity and antigenicity, and will not affect the effectiveness of the vaccine. Therefore, it is generally unnecessary to take preventive measures for the variation of the virus.
Yang zhanqiu said that people do not need to be particularly alarmed by the “new coronavirus mutation”, but just keep the normal protection emphasized before, that is, the public should wear masks, wash hands frequently and take self-protection measures when going out to public places.