We deeply know that the COVID-19 has swept the world since the beginning of 2019, and almost all countries are fighting the epidemic.
With the repeated emergence of epidemics, the virus is constantly changing, and genetic mutations have led to the continuous emergence of new variants of the virus...
Please take look at below link:
https://www.aosion.com/news/company/do-you-know-Omicron-2021.html
