The omicron variant is highly infectious, spreads more rapidly, has atypical clinical symptoms, and has the ability to evade binding of neutralizing antibodies and to evade the protective effects of the new crown vaccine. 1. The Omicron variant is more likely to cause human infection and spread among the population. Through our epidemiological analysis of the existing cases, the average intergenerational distance between Omicron infected cases is 3 days, which is further shortened than that of the Delta variant, which is about 4 days, and its spreading ability is about twice that of the Delta variant, so its spreading ability is more powerful and its spreading speed is also faster. 2. The symptoms of Omicron infection are atypical, so it is more invisible in the process of transmission. From the point of view of clinical manifestations, the symptoms of omikron infections are similar to those of upper respiratory tract infections caused by other viruses, and lack of specific manifestations, making clinical differential diagnosis more difficult, and the spread of the virus has become even more insidious. 3. After infection, the main clinical manifestations include cough, sore throat, fever, etc. Some patients have nasal congestion, runny nose, fatigue, headache and other symptoms. In addition, patients have atypical imaging changes. Overall, the proportion of patients with severe disease is also not very high. Those with underlying diseases are prone to develop severe and potentially life-threatening conditions. Therefore, if you are infected with the new crown variant strain of Omicron, you need to isolate and follow medical advice for treatment. It is also important to take precautions during the day by wearing a mask, keeping a safe distance, and paying attention to personal protection. In addition, you should also wash your hands regularly every day.