These three varieties have appeared all over the world. In Britain, 38 cases of XF have been found, and most of the 49 cases of XD in the world are in France. In addition, in terms of quantity, there are more cases of XE. As of the time of writing, 763 cases of XE have been confirmed in Britain, mostly in England, and 637 cases have not been found in the United States. Although the British Health Bureau claims that the XE mutation is less than 1% of the total sequencing samples, there is no significant difference with the initial growth rate of Omicron sisters.

On the smooth surface of the material, the Omicron mutant still had a certain spreading ability within 7 days, while the spreading ability of COVID-19 original strain was greatly weakened on the second day and lost on the fourth day. ? On the porous and uneven surface, the Omicron mutant can spread with the virus for 30 minutes, while the original strain will lose its ability to spread after 5 to 15 minutes. Omicron mutants can spread the virus on smooth surfaces such as glass, plastic and stainless steel for 7 days.

COVID-19 is a positive-strand RNA virus, and its genetic material RNA is not as stable as DNA during replication, so it is more prone to mutation. After infecting more people, a large number of replicated viruses are more likely to make mistakes when replicating genomes, which leads to gene mutation and evolution of new mutant strains. COVID-19 estimates that there will be a random mutation every half month. However, biologists at the University of Edinburgh point out that this estimate ignores some mutant strains that have not spread, and the true mutation rate in COVID-19 may be once a week on average.

Take out the contents after wiping. The outer packaging such as express bags and cartons can be properly treated according to the classification of domestic waste. Don't take it home. "Hand disinfection is still an important barrier for citizens to fight the virus." Huang specially reminded that in the process of taking the courier home, it is especially important not to touch the nose and mouth area of the face with the hand that has been exposed to the courier, and wash your hands as soon as you get home.