China News Service, Changchun, March 13 (Reporter Li Yanguo) The new coronavirus, which is spreading widely in Jilin Province, has the characteristics of hidden transmission, strong infectivity, fast transmission, difficult to detect in the early stage, and easy to form community transmission.
The reporter learned from the 34th press conference of Jilin Province's epidemic prevention and control work on the 13th that the infectivity of the Omicron BA.2 subtype that caused the epidemic in Jilin was about 30% higher than that of the previously popular BA.1. The replication titer in bronchial tissue is 70 times higher than that of the delta variant.
As of 24:00 on March 12, Jilin Province has reported a total of 2,052 local confirmed cases of new coronary pneumonia and a total of 1,527 asymptomatic infections of the new coronavirus.
Zhao Qinglong, director of the Emergency Office of the Jilin Provincial Center for Disease Control and Prevention, introduced that there are about 50 nucleotide mutation sites in the Omicron variant, of which more than 30 mutation sites are located on the spike protein of the virus. The spike protein is a viral infection. The key to human cells, the mutation can increase the ability of the virus to bind to human cells, thereby increasing the spread of the virus, and its infectivity is 37.5% higher than that of the delta variant.
Zhao Qinglong said that the infectivity of the BA.2 subtype that caused the epidemic was about 30% higher than that of the previously popular BA.1. The main transmission route was through respiratory droplets and close contact, but under certain conditions, those who were exposed to virus contamination. Items and exposure to virus-contaminated environments can cause contact transmission or aerosol transmission.
Zhao Qinglong said that because most patients have no obvious symptoms after infection, many people have no symptoms, and some mainly have some lack of specific symptoms such as fever, dry cough, headache, nasal congestion, fatigue, sore throat, etc., which leads to the hidden spread of the virus. The sex is very strong, and it is more prone to multiple or concentrated outbreaks.
Zhao Qinglong said that wearing masks, washing hands frequently, frequent ventilation, less gathering, and one-meter noodles can effectively reduce the chance of infection.
Continuously carrying out multiple rounds of nucleic acid testing is to quickly clear the warehouse and bottom out.
Jilin Province will promote the monitoring mode of "antigen screening and nucleic acid diagnosis", and the masses can purchase tests by themselves, which is conducive to early detection.
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