Just reported! “XBB detected among immigrants”

Which is the current main circulating variant strain of the new coronavirus in Hangzhou? Will it cause secondary infection? ! !

With the global pandemic of new coronavirus infection, mutant strains are also emerging, and the Omicron mutant strains BA.5.2, BF.7, XBB, BQ.1, etc. have attracted much attention recently.

So, which is the current main circulating variant strain of the new coronavirus in Hangzhou?

In accordance with the national, provincial and municipal surveillance plans, the Hangzhou Center for Disease Control and Prevention carried out whole-genome sequencing of the new coronavirus on some immigrants, patients at sentinel hospitals, and specimens from hospitalized cases to understand the mutation trend of virus strains in real time and analyze the impact of mutations on virus characteristics and immunity. Escape ability, etc.

According to virus strain monitoring, the new coronavirus strains detected in local cases in the city in the past week are all Omicron variants 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.

Strain BQ.1 and XBB have become the main prevalent strains in some European and American countries. Many citizens are worried about the introduction of new mutant strains, which 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 Omicronnew mutation branch, has become the dominant strain in some European and American countries, mainly characterized by the followingIncreased transmissibility and immune evasion ability. However, foreign data show thatIts 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 will decrease. decline, and when encountering strains with strong immune evasion capabilities, the risk of reinfection will increase.

but,Re-infection mainly occurs in some people with low immunity. People with normal immune function are less likely to be infected again in a short period of time, 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, the general public does not need to worry too much and should continue to adhere to effective personal protection and social etiquette (one meter of noodles, frequent hand washing , wear masks, provide more ventilation, etc.), maintain healthy and civilized living habits, and actively get vaccinated.