On October 22nd, 2121, South African scientists first discovered and reported this virus pedigree, thus "sounding the alarm". Subsequently, Botswana and Hongkong, China also reported the virus pedigree one after another, and then, Belgian and Israeli patients with new variant virus infection were also diagnosed. The scientific name of this new variant virus is B.1.1.529, and it was named Omicron (Greek letter 15) by the World Health Organization (WHO). With the emergence of this new virus in the past two days, various countries have taken new measures. For example, on 26th, the United States announced that the closed countries had added entry restrictions to these two countries, and the ban will take effect on 29th October. Japan has also announced that it will close all its ports to the outside world from October 31, and prohibit foreign personnel from coming and going. Then why countries are so worried about the spread of this virus in their own countries is mainly determined by three characteristics of the new virus:

1. The new variant virus spreads quickly: this variant virus spreads faster among the original viruses in South Africa, and its speed has exceeded the previous "poison king" Delta. At present, this variant virus has led to an increase in the number of new infections in South Africa, and caused an obvious "amplitude", that is, there was no buffer period for the previous virus outbreak, and the number of confirmed cases soared once it was discovered. And within a week of discovery in South Africa, five other countries have developed the same virus.

2. The virus carried during transmission is large and more pathogenic. This time, Omicron looks like a prepared sneak attacker. Experts found that his ability to break through the human immune barrier has also been enhanced, which makes people with some basic diseases and poor self-immunity more susceptible to virus infection, or the complications of patients will increase after infection. It is said that it spreads twice as fast as the Delta virus.

3. the new virus may lead to the fact that the current vaccine can't play a good immune role. This is mainly because the spike protein of this new variant virus has 32 mutations, and these mutations are aimed at the "training" site of the vaccine for human immune system to recognize Covid-19. The new virus has become more cunning, and the effect of the antibody produced by the injected vaccine in the face of the new virus remains to be seen.

Of course, as the new Omicron virus has just been discovered, our understanding of it is still in the primary stage. The first thing we should do is not to panic. The world has experienced this virus for two years, and the preventive measures in all aspects have been greatly improved. And it is not certain that the vaccine will not work for this new virus. And our own immune ability is still an important barrier for us to resist viruses and protect our bodies. We should believe in our country and our scientists, and we will finally win the final victory in this war against the virus.