The new crown, now known as the Omicron variant. It is highly contagious, spreads more rapidly, has atypical clinical signs, and has the ability to evade binding of neutralizing antibodies and escape the protective effects of the new crown vaccine.
1. Stronger infectiousness and faster transmission: the omicron variant is more likely to cause human infection and population transmission. Through our epidemiological analysis of existing cases, the average intergenerational spacing between omicron infected cases is 3 days, which is further shortened than that of the delta variant, which is about 4 days, and its transmission capacity is about 2 times that of the delta variant, so the transmission capacity is stronger and the speed is faster. faster.
2. Symptoms of Omicron infection are atypical: therefore, it is more invisible in the process of transmission. In terms of clinical manifestations, omicronjon infections are similar to upper respiratory tract infections caused by other viruses and lack specific manifestations, which makes clinical differential diagnosis difficult and makes the spread of the virus more insidious.
3. Infected cases are mainly light and common type, and the symptoms are relatively mild. The main clinical manifestations include cough, sore throat, fever, etc., and some patients have nasal congestion, runny nose, fatigue, headache and other symptoms. In addition, patients had atypical imaging changes. Overall, the proportion of patients with severe disease is also not very high.