The first mutant virus strain BA.5 was imported into Shanghai. What are the characteristics of this mutant virus strain?

Since 2022, Beijing, Shanghai, Tianjin and other places have been fighting against Omicrons, and various mysterious Kelon mutants are popular in various countries. Recently, China also reported the first imported case of Omicron mutant strain BA.5, which is the first time that Omicron mutant strain BA.5 series was found in China. Since the COVID-19 epidemic, different COVID-19 have been mutating, but we can find that all the reported medical records are relatively mild compared with the original poisoned pigs, and the mutation rate is also on the decline, but we don't have to worry too much. As long as we carry out epidemiological prevention and control through better nucleic acid screening and metastasis, it will be controlled, and novel coronavirus is here.

Compared with Delta, Omicron is less toxic, but it spreads widely, sweeping the world quickly, causing most people to be infected. After infection, the number of people will end, but the mortality rate will decrease in the same period, and asymptomatic or mild cases will increase. Because of its small independence, it won't cause too many deaths in a short time. Through reasonable control, Omicron mutants can be reduced quickly and effectively.

The mutant strain BA.5 from Omicron was first discovered in South Africa, and passengers took it to China through an inbound flight in South Africa.

Immune escape ability is enhanced. Omicorn mutant has infected people in the early stage, and the immunity obtained by vaccine and cough caused by spinal cord infection can effectively prevent COVID-19 from being reinfected. However, due to the emergence of BA.5, the number of cases in novel coronavirus may increase sharply, which may lead to frequent new infections, especially in South Africa. Since the discovery of the infection sequence of BA.5 virus, more than 6,300 positive cases have been recorded, and this sequence of cases has also been reported in Germany, Denmark and the United Kingdom.

In order to capture the mysterious clonal variation, we need to face up to the infection situation in COVID-19. The wider and more serious the spread, the greater the possibility of variation. After re-transmission, we need to understand the branches of Omicron through the study of pathogenicity and immune escape. Therefore, we need to be alert to the mysterious clone mutant BA.5, but don't panic about the risk of infection, because the risk of severe illness is low. We hope that through the basic protection of vaccination, the serious risk of virus infection can be further reduced.