The global new crown epidemic is threatened by a number of variant virus strains, and there is a risk of re-emergence in the coming winter. Among them, BQ.1.1, which belongs to the offspring of BA.5 of the Omicron variant branch, spreads rapidly in more than 10 countries around the world within three months. The Center for Protection announced yesterday that the first imported case in Hong Kong was BQ.1.1. The director of the Center for Infection and Infectious Diseases of the University of Hong Kong, He Bailiang, also said that the growth rate of BQ.1.1 was 30% faster than that of BA.5, and there were as many as 5 key mutations in the S protein. Bits, among the multiple variant strains, should be the ones that require the most attention.
How amazing is the power of BQ.1.1? "Hong Kong 01" combines local experts and global data to analyze the transmission power of BQ.1.1, the risk of secondary infection, the protection of vaccines, and the risk of severe illness.
▼The arrival level of the airport on the first day of the implementation of the entry quarantine "0+3" on September 26▼
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The new crown epidemic has been going on for nearly three years. Countries have successively withdrawn various epidemic prevention measures. The global epidemic situation is still fluctuating. Recently, the United Kingdom, the United States and Singapore have all recorded a rebound in confirmed cases. Among them, the British health department is particularly concerned about the BQ.1.1. As of the 8th of this month, more than 60 cases have been recorded locally.
The Canadian Ministry of Public Health of Ontario issued an analysis and evaluation report on BQ.1 and BQ.1.1 earlier this month. It mentioned that BQ.1.1 was first discovered in Nigeria in mid-July this year, and it has only been detected in the United Kingdom, Japan, and the United States for about three months. , Canada, Belgium, Denmark and more than 10 countries found that Canada has recorded 12 cases as of the beginning of this month.
Although BQ.1.1 cases are still a minority in the world at present, because it is a variant virus strain with high risk of transmission, experts also estimate that there may be significant immune escape, so special attention should be paid, but there is no evidence to show that BQ.1.1 Severity and mortality will increase.
Overview of BQ.1.1 Variant Virus Strain:
- First discovered in Nigeria in mid-July this year
- Descendent of Omicron variant branch BA.5 -
S protein has the most 5 key variants
- 30% faster than BA.5 growth rate
- Recovery High risk of secondary infection-increased
transmission capacity
-possible to weaken the efficacy of drugs and vaccines
-no evidence yet to increase the risk of severe illness and death
He Bailiang, director of the Center for Infection and Infectious Diseases at the University of Hong Kong, also posted on Facebook that different virus strains are being born around the world. In the end, which virus strain will swept the world and become the winter virus king. It is difficult to predict at this stage. It is the next generation of BA.2 or BA.5, such as XBB, BA.2.75.2, BF.7 with existing cases in Shenzhen, and BQ.1.1, which is the most focused in the UK recently.
Compare the 5 key variants of the S protein of the newly born different virus strains around the world, of which BQ.1.1 has all 5 at most.
(Image source: He Boliang facebook)
He pointed out that the power of the variant virus strain depends on the five key variants of the S protein (R346, K444, L452, N460 and F486), of which BQ.1.1 covers five, compared to XBB only three, and The growth rate of BQ.1.1 is 30% faster than that of BA.5, and the other viruses are only 20% or even less than 10% faster, so it is worth paying attention to.
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