Omicron BA.2 subvariant zoo li yuav kis tau ntau dua li BA.1. Nws kuj muaj cov khoom tiv thaiv kab mob tiv thaiv kab mob uas ua rau txo qis kev tiv thaiv ntawm kev txhaj tshuaj tiv thaiv kab mob.
Thaum Lub Kaum Ib Hlis 26, 2021, WHO tau xaiv B.1.1.529 variant ntawm SARS-Cov-2 raws li Variant ntawm kev txhawj xeeb (VOC), thiab muaj npe omicron.
Raws li hnub tim, Omicron suav nrog Pango caj ces B.1.1.529 thiab xeeb leej xeeb ntxwv Pango BA.1, BA.1.1, BA.2 thiab BA.3. Lub ntsiab lus hloov pauv tag nrho sib tshooj nrog cov kab BA.1. Cov xeeb leej xeeb ntxwv ntawm BA.2 txawv ntawm BA.1 hauv qee qhov kev hloov pauv, suav nrog hauv cov protein ntau.
BA.2 variant yog nce nyob rau hauv ntau lub teb chaws. Hauv ntau lub tebchaws, ob omicron subvariants tau pom BA.1 thiab BA.2.
Hauv tebchaws Denmark, BA.2 tau hloov pauv sai sai BA.1 thiab tau dhau los ua qhov tseem ceeb subvariant. Hauv kev tshawb fawb thoob tebchaws tsis ntev los no ntawm cov tsev neeg Danish, qhov kev tawm tsam thib ob (SAR) tau kwv yees li 29% thiab 39% hauv cov tsev neeg uas muaj Omicron BA.1 thiab BA.2, raws li.
BA.2 tau pom tias muaj feem cuam tshuam nrog kev kis tus kab mob ntau ntxiv rau cov tib neeg uas tsis tau txhaj tshuaj tiv thaiv (Odds Ratio 2.19), cov tib neeg tau txhaj tshuaj tag nrho (OR 2.45) thiab cov neeg txhaj tshuaj tiv thaiv kab mob (LOSSIS 2.99), piv rau BA.1.
Cov kws tshawb fawb kuj pom muaj qhov nce ntxiv kis tau tus mob los ntawm qhov tsis tau txhaj tshuaj thawj zaug hauv BA.2 tsev neeg thaum piv rau BA.1 tsev neeg. Tus qauv ntawm kev kis tau nce ntxiv hauv BA.2 tsev neeg tsis tau pom zoo rau cov neeg mob uas tau txhaj tshuaj tiv thaiv kab mob thiab tshuaj tiv thaiv kab mob ntxiv.
Thaum xaus, omicron BA.2 subvariant zoo li kis tau zoo dua li BA.1. Nws kuj muaj cov khoom tiv thaiv kab mob tiv thaiv kab mob uas ua rau txo qis kev tiv thaiv ntawm kev txhaj tshuaj tiv thaiv kab mob.
***
Qhov chaw:
- WHO 2022. Tracking SARS-CoV-2 variants. Muaj nyob ntawm https://www.who.int/en/activities/tracking-SARS-CoV-2-variants/ Tau txais los ntawm 04 Lub Ob Hlis 2022.
- Lyngse FP, thiab al 2022. Transmission of SARS-CoV-2 Omicron VOC subvarants BA.1 and BA.2: Evidence from Danish Households. Preprint medRxiv. Tshaj tawm Lub Ib Hlis 30, 2022. DOI: https://doi.org/10.1101/2022.01.28.22270044
***
