Yangtze River Daily Wuhan Client October 21 (Reporter Jiang Mengqing) At present, the domestic epidemic is showing a multi-point sporadic trend. The virus strain in our city has been sequenced by the virus gene of the Municipal Center for Disease Control and Prevention. It is the evolution branch of the Omickron mutant strain BA.5.2. On October 21, Professor Wei Sheng from , School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, pointed out in an interview with , Yangtze River Daily, reporter that judging from the incidence of infected people in this round of epidemic in Wuhan, it is mainly upper respiratory tract infection. The BA.5.2 mutant strain is prone to proliferation and detoxification in large quantities, with a short incubation period and faster transmission speed. Given the strong contagiousness of this strain, the general public should strengthen prevention and not gather unless necessary to reduce the risk of infection and transmission.
BA.5.2 mutant strain has a short incubation period and strong escape
"Comprehensively with recent research results on the epidemiological characteristics of the secret Kerong mutant strain and the intergenerational transmission interval time, compared with previous strains, the BA.5.2 evolutionary branch has two major characteristics." Wei Sheng pointed out that, first, the viral load is high and extremely contagious. According to relevant research reports, the basic regeneration number of this strain is 18.6. In layman's terms, on average, 1 infected person can be transmitted to 18 people during the infection period, which is very easy to cause large-scale transmission, and the difficulty of handling and controlling the epidemic has increased exponentially than before.
Second, the average latency period is relatively short. The average latency period observed in this round of BA.5.2 evolution branch of the epidemic is 2 to 3 days, mostly 2 days, and the shortest is only 1 day. The proportion of asymptomatic infections in is relatively high, resulting in an increase in the difficulty of early detection and early control of cases. Therefore, it is easy to "sneak" in the crowd, causing hidden transmission.
insist on wearing masks and not gathering unless necessary
"In view of the extremely contagious nature of this round of epidemic strain BA.5.2, wearing masks scientifically and not gathering can effectively reduce the risk of transmission and prevent the spread of the epidemic." Wei Sheng emphasized that during the critical period of epidemic prevention and control, citizens should actively cooperate with various prevention and control measures at this stage. They should not gather in crowded places unless necessary, try not to have dinners and parties, enhance personal protection awareness, insist on washing hands frequently, ventilating regularly, using separate meals, using public chopsticks, and maintaining a social distance of 1 meter line.
Secondly, citizens should also actively participate in the normalized nucleic acid test . The Omickron mutant strain BA.5.2 can spread rapidly in a short period of time and is highly hiding. Due to the time difference between the infection of virus and the ability to detect viruses, only repeated detection in a short period of time can the infected person be detected as quickly as possible. It is very necessary for the general public to actively participate in multiple rounds of normalized nucleic acid testing. We must do "test all those who should be tested" to achieve " dynamically clear " as quickly as possible to prevent and control the spread of the epidemic.
In addition, the general public should implement personal health management and conduct self-health monitoring. If suspicious symptoms such as sore throat, fever, and cough occur, take the initiative to contact community staff , and go to medical institutions in time to seek medical treatment while taking personal protection.
People coming to (returned) in Wuhan actively report and cooperate with the implementation of the inspection
"Real inspection, actively report itinerary and health information, and cooperate with the implementation of various epidemic prevention and control management measures are effective measures for us to prevent imported epidemics." Wei Sheng reminded that all people coming to (returned) in Wuhan should actively report relevant information online on the "WeChat-Service-Epidemic Health Code" interface or the "Wuhan Fight Epidemic WeChat Mini Program" in advance, click "Reporting Information of Personnel from (returned) in Wuhan" to fill in relevant information online for reporting, and cooperate with various measures such as nucleic acid testing, home isolation and health monitoring.
Citizens in Wuhan strictly abide by the epidemic prevention and control requirements, enter residential communities (villages), units, various public places, take public transportation, etc., actively present a negative nucleic acid test certificate for 24-hours, and actively cooperate with scanning the code to measure temperature.
[Editor: Ding Mian]
