Expert: New coronavirus has not yet mutated significantly

WHO and China’s joint expert team 22 into the outbreak of the center of the region – Wuhan, Hubei Province, after they have been in Beijing, Guangdong and Sichuan three places to study. The joint expert inspection team held a press conference in Beijing on the evening of the 24th. Liang Wannian, head of the Chinese team and head of the national health and health committee’s new coronapneumonia response and disposal team, said that by sequencing the whole genome of 104 new coronavirus strains isolated at different locations, it was confirmed that homologous ness reached 99.9%, indicating that the virus had not yet undergone significant mutations.

Our reporter, Bai Yunyi

Expert: New coronavirus has not yet mutated significantly

Liang Wannian said that the epidemiological characteristics of the outbreak of new coronary pneumonia: according to the infectious disease network direct reporting information system data and Hubei Wuhan, Guangdong Shenzhen and Guangzhou, Sichuan Chengdu and other on-site visits, the joint inspection team has the following understanding of the epidemiological characteristics of new coronary pneumonia: First, demographic characteristics. The average age of patients was 51 years, with 77.8% of patients aged 30-69 and 77.5% of cases coming from Hubei. The second is the animal host. Current research suggests that bats may be the host of the new coronavirus, and pangolins may be one of the intermediate hosts of the new coronavirus. Third, the means of communication. At present, respiratory droplets and contact transmission is considered to be the main route of transmission, from some confirmed patients in the feces detected a new coronavirus, there is a risk of dung-mouth transmission. The new coronavirus may be spread by aerosols, but this is not the main mode of transmission in China. Fourth, family gathering. From the on-site visits in Guangdong and Sichuan, 78%-85% of the cluster cases occurred in the family. Fifth, close contact management. In Guangdong and Sichuan, on-site epidemiologists tracked and medically observed almost all of the close contacts found, and about 1 to 5 percent of the close contacts were laboratory positive. Six is susceptibility. New coronavirus is a new pathogen, therefore, people of all ages are not immune to the new coronavirus, generally easy to infect.

The Chinese expert said that after contracting the new coronavirus pneumonia, the number of patients in the three categories of mild, severe and critically ill disease was about 80%, 13% and 6%, respectively, and the national fatality rate was between 3% and 4%, and if Wuhan was removed, the figure would be only 0.7%. It takes 2 weeks for patients with mild illness to recover, while for severe patients it takes 6 weeks.

Bruce Alward, head of the China-WHO Joint Expert Expedition Group on New Coronary Virus Pneumonia, said on thursday that the world is not yet ready to respond to the new coronavirus outbreak with AChinese method, but China’s approach is the only method we know and has been proven to be effective, such as effective barrier measures.

“It is China that has built the first line of defense to stop the spread of the virus in the world,” he said. He suggested that other countries seriously consider measures similar to those taken by China and “build a second line of defense”.

The team believes that the new coronavirus is a new pathogen, the global prevention and control work is still facing serious challenges, recommended that countries carry out proactive monitoring, early detection, early diagnosis, early isolation, early treatment, strict tracking and isolation of close contacts. I’d