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KMID : 1143420220150492917
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Public Health Weekly Report
2022 Volume.15 No. 49 p.2917 ~ p.2924
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Omicron Subvariants (BQ.1, BQ.1.1, etc.) Outbreak Status
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Kim Il-Hwan
Park Ae-Kyung
No Jin-Sun
Lee Hyeok-Jin
Kim Jeong-Ah
Lee Chae-Young
Rhee Jee-Eun
Kim Eun-Jin
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Abstract
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Due to the prolonged the Coronavirus disease 2019 pandemic, various variants of SARS-COV-2 have been continuously
emerging. The omicron variants, which first appeared in November 2021, have rapidly spread across the world. Although
omicron BA.5 remains dominant as of October 31st, 2022, multiple omicron subvariants have been reported worldwide.
Specifically, the proportion of patients infected with BA.5 subvariants including BQ.1, BQ.1.1, BF.7, and recombinant variant
XBB, has been increasing. Although there have been no reports on the severity of infection for each variant, they are being
detected faster and exhibit increased rate of immune invasion. Hence, it is possible that some of these variants become
dominant worldwide in the future. Therefore, the Korea Disease Control and Prevention Agency should actively monitor the
overseas trends of the omicron variants and continue strict surveillance of overseas entry cases, domestic cases, and emergence
of variants.
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KEYWORD
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SARS-CoV-2, COVID-19, SARS-CoV-2 variant, SARS-CoV-2 omicron variant
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