Luo Yijun, deputy head of the Medical Response Team of the Central Epidemic Command Center, announced today that both domestic and overseas imports are still dominated by BA.5, but the domestic BA.5 accounted for 62% in the latest week, a sharp drop from 82% in the previous week, and BA. 2.75, BQ.1, and BF.7 rose, of which BQ.1 rose from 3% to 14%, the highest jump.

(Provided by Command Center)

[Reporter Lin Huiqin/Report from Taipei] The change of mutant strains is one of the keys to the development of the epidemic. Luo Yijun, deputy head of the medical response team of the Central Epidemic Command Center, announced today that both local and overseas imports are still BA.5. .5 accounted for 62%, a sharp drop from 82% in the previous week, while BA.2.75, BQ.1, and BF.7 rose, of which BQ.1 rose from 3% to 14%, with the highest surge, from Europe, America and From the experience of the epidemic in Japan, BQ.1 may become the next wave of mainstream strains in my country, but the actual situation still needs further observation.

Luo Yijun pointed out that 42 new local cases have completed virus sequencing, of which 26 cases are BA.5, 21 males and 21 females, ranging in age from less than 5 years old to over 90 years old, distributed in 17 cases in the north and central China. 4 cases, 4 cases in the south, and 1 case in the east. The date of diagnosis was between November 3 and December 22 last year.

The rest were 8 cases of BA.2.75, 6 cases of BQ.1, and 2 cases of BF.7.

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Luo Yijun explained that BA.5 is still the majority in the local area, but its proportion has dropped from 82% to 62%. The other three emerging variants have shown growth, including BA.2.75 rising from 12% to 19%, and BQ.1 from 3 % rose to 14%, and BF.7 rose from 3% to 5%.

As for overseas immigration, 63 new cases completed the virus identification sequence, including 50 males and 13 females, ranging in age from less than 5 years old to more than 70 years old, and the date of entry was between December 16 and December 23 last year. .

Among them, 37 cases were BA.5, including 20 cases from China, 8 cases from Hong Kong, 4 cases from Japan, 3 cases from South Korea, and 1 case from Vietnam and Macau; 12 cases were BF.7, 5 cases from China, 3 cases from Hong Kong, and Macau 9 cases were BA2.75, 4 cases were from South Korea, 1 case was each from Japan, the United States, Thailand, Czech Republic and Vietnam; 2 cases were BQ.1, 1 case was from Turkey and Malaysia; 2 cases were XBB , 1 case from Hong Kong and 1 case from Egypt; 1 case was BA.2 from Japan.

Luo Yijun pointed out that BA.5 accounted for the highest proportion of 59%, followed by 19% of BF.7, which was related to the increase of immigration cases from China and Hong Kong. The rest still had 14% of BA.2.75, 3% of XBB, BQ.1 and BA.2 2% each.

Luo Yijun also further explained that BQ.1 is a mutant strain of Omicron BA.5, accounting for at least 42.5% of the world. It is a mainstream virus strain with high infectivity, but the disease severity and fatality rate are the same as those of other Omicron. high.

The new mutation of the BQ.1 mutant strain has the advantage of immune escape and has a higher probability of superinfection.

Luo Yijun pointed out that vaccination of the BA.5 next-generation vaccine booster against emerging mutant strains such as BQ.1, BF7, and XBB can reduce the risk of severe illness, hospitalization, or death caused by infection with COVID-19. The public is requested to vaccinate as soon as possible.

In addition, the outside world is concerned about the emerging mutant strain XBB.1.5 that is prevalent in the United States. Luo Yijun emphasized that no related cases have been detected in China or imported from abroad.

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