Research finds that the probability of infection with new coronary pneumonia is determined by contact method
Medical profession
Science and Technology Daily (Reporter Yong Li) The way of contact with the new coronary pneumonia case determines the possibility of infection.
Frequent and prolonged contact with the case and contact with the case in the early stages of infection are the decisive risk factors for the new coronavirus.
On December 1, the reporter learned from Chongqing Medical University that the team of Professor Huang Ailong of the school has obtained corresponding evidence for the research on the epidemic characteristics of the new coronavirus disease in the population, the transmission capacity and the effects of prevention and control measures.
The research results were published online in the journal Nature Medicine on November 30. The article provides information on the possible re-emergence of the national autumn and winter new crown epidemic and the public health policies of other countries and regions in the world in response to the new crown virus infection. The reference basis.
It is understood that starting from February 16, 2020, the Chongqing Medical University team has cooperated with the Wanzhou District Center for Disease Control and Prevention to target confirmed cases, asymptomatic infections and close contacts in Wanzhou District from January 21 to April 10 An in-depth detailed analysis and summary were carried out on the epidemiological survey data.
"Confirmed cases and asymptomatic infections are not the same as the ability to transmit the virus." Project leader Huang Ailong said that through the analysis of confirmed cases, asymptomatic infections and close contacts found in Wanzhou District from January 21 to April 10 Epidemiological survey data, studies have found the heterogeneity of transmission between confirmed cases and asymptomatic infections.
Only 43% of the 30 confirmed cases imported from Wanzhou did not infect other people, and 23% infected 4-7 people; while in the 9 imported cases of asymptomatic infection, 78% did not infect other people.
With the increase of generations, most of the confirmed cases and asymptomatic infections did not infect other people.
In addition, the method of contact with the new coronary pneumonia case determines the possibility of infection.
Frequent or prolonged (more than 8 hours) contact with the case through the multi-level Logistic regression model, or contact with the case in the early stage of infection (5 days) is the decisive risk factor for new coronavirus infection.
Moreover, the possibility of infection is not related to gender and age.