1. About whether the new coronavirus is mutated
At present, relevant experts have performed genome-wide sequencing of 104 new coronavirus strains isolated from different locations, and have now confirmed that the homology has reached more than 99%, which also suggests that the virus has not yet undergone significant mutations.
2. Epidemiological characteristics of the new coronary pneumonia epidemic
According to the relevant data, as well as investigations in Wuhan, Hubei, Guangzhou, Shenzhen, and Chengdu, Sichuan, etc., we have the following knowledge about the epidemiology of new coronary pneumonia:
2.1 Demographic characteristics
From the analysis of big data, at present, the average age of patients with new coronary pneumonia is 51 years old, 77.8% of patients are between 30-69 years old, of which 77.5% of the cases come from Hubei.
2.2 Animal host
According to current research, the host of the new coronavirus is likely to be bats, and one of the intermediate hosts of the new coronavirus may be the pangolin.
3. Transmission channels
Regarding the spread of the new coronavirus, we can know from the current research that the main transmission routes are respiratory droplet transmission and contact transmission. At the same time, new coronaviruses have also been detected in the stools of some diagnosed patients, which indicates the presence of stool The risk of oral transmission. In addition, there are also cases of aerosol transmission, but this is not the main mode of transmission in China.
4. Family aggregation
Regarding the situation of family aggregation, relevant personnel conducted on-site inspections in Guangdong and Sichuan, and obtained such data: 78% -85% of aggregation cases occurred in families.
5. Management of close contacts
Relevant workers have conducted follow-up and medical observations on all the close contacts found in Guangdong and Sichuan. The proportion of positive contacts in the laboratory confirmed as positive is about 1% -5%.
Because the new coronavirus is a new pathogen, people of all ages are not immune to the new coronavirus and there is a general susceptibility.