China News Service Harbin, April 28 (Reporter Zhao Yinuo, Shi Yifu) At the 51st press conference of the "New Heilongjiang Provincial Government Joint Office for Joint Prevention and Control of New Coronary Pneumonia Outbreak" held on the 28th by the Heilongjiang Provincial Government Information Office Academician, President of Harbin Medical University, and Professor Zhang Xue, Dean of Heilongjiang Academy of Medical Sciences explained that Harbin's epidemic rebounded and Han was very likely to spread the source of the chain.
Zhang Xue, academician of the Chinese Academy of Engineering and president of Harbin Medical University, introduced at the meeting that on April 15, the Heilongjiang Provincial Center for Disease Control sent the two batches of samples to the Chinese Center for Disease Control for whole-genome sequencing.
The picture shows Academician Zhang at the conference. Photo by Liu Bingxin
"The two batches of samples we sent received 21 genome-wide sequence data. Bioinformatics experts at the China Center for Disease Control and Harbin Medical University analyzed the genome sequence data and found that 99.99% of these genome sequences were consistent. Among them, 18 people 'S genome is exactly the same. The other three are only 1-2 nucleotides apart. "Zhang Xue said, analyzing the genome of 21 people, it was determined to be a propagation chain. It also proved that the virus was spread by a person.
"It is obvious from the analysis of gene sequencing that the new coronavirus genome sequence of this propagation chain is significantly different from the previously tested viral genome sequence in the Chinese population." Zhang Xue said that the sequencing results support that the source of the transmission is from abroad and is imported from abroad Case. Comprehensively considering information such as genome sequencing analysis and evidence association of epidemiological investigation, it is now more supportive of Han as the source of the epidemic rebound.
After Han had ended his home isolation in Harbin, he had dinner with his family and had gone to Shanghai for surgery, but it has not caused infections of other related personnel. Zhang Xue explained, "When Han lifted his home isolation in Harbin The relevant departments conducted negative nucleic acid tests on several of them, but they were all negative. However, the two IgG antibody tests were positive, proving that they had specific antibodies. "
"Popularly speaking, the new coronavirus in Han's body has been defeated by his own immune system, and the chance of infecting others has been greatly reduced." Zhang Xue said, this means to some extent, at this time, Han's close contact with the virus The possibility of transmission to others has been reduced. (Finish)