According to today's news from the Hangzhou Municipal Health Commission, with the global pandemic of new coronavirus infections, mutant strains are also emerging. Omicron mutant strains BA.5.2, BF.7, XBB, BQ.1, etc. have recently attracted much attention.
In accordance with the national, provincial and municipal surveillance plans, the Hangzhou Center for Disease Control and Prevention has carried out whole-genome sequencing of the new coronavirus on some immigrants, patients at sentinel hospitals, and specimens of inpatient cases to understand the mutation trend of virus strains in real time and analyze the impact of mutations on virus characteristics, immune escape ability, etc.
According to virus strain monitoring, the new coronavirus strains detected in local cases in Hangzhou in the past week are all Omicron mutant strains BA.5.2 and BF.7, of which BA.5.2 accounts for 54.17% and BF.7 accounts for 45.83%. At the same time, XBB, BQ.1, BQ.1.19 and other Omicron clade virus strains have also been detected among inbound travelers under closed-loop management.
Previously, Yuan Zheng'an, a member of the expert group of the Shanghai Epidemic Prevention and Control Leading Group, said that the Omicron BQ.1 and XBB strains currently discovered in Shanghai have only been detected in a very small number of people entering quarantine and have not yet caused local spread in society.
Zhejiang: The number of new coronavirus infection cases has increased by about one million in a few days
According to the official WeChat message of the Zhejiang Provincial Center for Disease Control and Prevention, Zhejiang Province has recently entered the peak of the new coronavirus infection epidemic, and respiratory infectious diseases such as influenza (hereinafter referred to as "influenza") continue to be in the epidemic season.
Recently, the number of new coronavirus infection cases in Zhejiang Province has increased by about one million in a few days. It is expected that the epidemic will enter the peak plateau period in January. The Spring Festival is approaching, and the mobility of people across regions will increase significantly, which will lead to the further spread of the epidemic. In addition, with the adjustment of entry policies, the risk of introducing new mutant strains from abroad and causing local transmission will also increase significantly. Will
XBB and BQ.1 cause to infect again? Latest response
strains BQ.1 and XBB have become major epidemic strains in some European and American countries. Many people are worried that the introduction of new mutant strains will make domestic epidemic prevention and control more complicated. Experts have some tips for dealing with these concerns.
Q1: What are the XBB and BQ.1 mutant strains?
Answer: XBB and BQ.1 are new mutant branches of Omicron and have become dominant strains in some European and American countries, mainly characterized by increased transmissibility and immune evasion capabilities. However, foreign data show that its pathogenicity is not significantly different from previous strains, and the severe disease rate and mortality rate have not increased in countries where XBB and BQ.1 are prevalent.
Q2: Will XBB and BQ.1 cause secondary infection?
answer: XBB and BQ.1 are both sub-branches of BA.5. The immune evasion ability of the above strains has been enhanced, which is different from the BA.5 popular in my country. After a period of time after infection with BA.5, the level of protection decreases. When encountering strains with strong immune evasion capabilities, the risk of reinfection will increase.
However, reinfection mainly occurs in some people with low immunity. People with normal immune function The risk of reinfection in a short period of time is relatively small, and the symptoms after infection are usually milder than the first time.
Q3: How to deal with possible secondary infections caused by XBB and BQ.1?
Answer: Although XBB and BQ.1 may cause secondary infection in people with low immunity , there is no need to worry too much. You should continue to adhere to effective personal protection and social etiquette (one meter of noodles, wash hands frequently, wear masks, ventilate frequently, etc.), maintain healthy and civilized living habits, and actively get vaccinated.
Source: Healthy Hangzhou, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou Daily
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