Currently, there are mutated strains of Neocoronavirus such as Alpha, Beta, Gamma, Delta and Omicron. Compared with other strains of Omicron, the infectious ability of Omicron has increased, mainly manifested in the rapid transmission speed, the process of transmission is more insidious. 1. Faster transmission: Current data show that the Omicron variant survives longer on the surface of objects, and its transmission speed is 13 times higher than that of the general strain, and about 2.8 times higher than that of the Delta strain. 2. Transmission is more insidious: Patients infected with Omicron are more inconspicuous, and early symptoms are usually mild, usually only nasal congestion, fever, sore throat, which can be easily overlooked, resulting in the spread of the virus to many asymptomatic infected people. In the face of the more contagious Omicron variant, we need to take good personal precautions and actively cooperate with nucleic acid testing to detect infected people as early as possible.