Changzhou infection rate

What is the reason for the high proportion of asymptomatic infected people in Changzhou? In this regard, Yao Cheng, a member of the party group of Changzhou Health and Wellness Committee and deputy director of the Administration of Traditional Chinese Medicine, said that asymptomatic infected people have two meanings, one is "infected" and the other is "asymptomatic". First of all, COVID-19 is indeed infected, that is, COVID-19's nucleic acid test is positive and needs isolation treatment; The second is asymptomatic. At present, there are no symptoms and signs such as sore throat, fever, fatigue, dry cough and hypoesthesia. At the same time, there is no pneumonia in CT images.

It should be emphasized that asymptomatic infected people are also contagious, and their transmission route is the same as that of confirmed cases. Therefore, according to the relevant national requirements, asymptomatic infected people should also be screened for close contacts and sub-close contacts, and high-risk groups should be screened, and corresponding on-site control measures should be taken. Take the same measures as the confirmed cases to control and screen the close contacts and sub-close contacts of asymptomatic infected people.

The proportion of asymptomatic infected people admitted this time is relatively high. According to the analysis of the expert group, there are three main reasons:

First of all, it is related to the infected virus strain. The virus strains infected this time are mainly Omicron mutant strains, which are characterized by rapid spread and obvious decline in virulence (pathogenicity), showing a relatively high proportion of asymptomatic and mild symptoms.

Second, it has something to do with vaccination. At present, the first injection rate of the whole population in Changzhou is 102.62%, the whole vaccination rate is 97.90%, and the first injection rate of the permanent population aged/0/8 and above is 104.20%. Most of these patients were injected with two or three doses of vaccine. Although the vaccine can't completely avoid infection, it obviously reduces the proportion of symptoms and severe cases.

Third, it has something to do with infected people. Most of these infected people are young adults and adolescents, and there are fewer elderly people and people with basic diseases, so most of them show mild asymptomatic infection.