![BA.2 is like Omicron's sister. Here's what we know so far - UQ News - The University of Queensland, Australia BA.2 is like Omicron's sister. Here's what we know so far - UQ News - The University of Queensland, Australia](https://www.uq.edu.au/news/filething/get/261972/antigen-g8fb51abb1_1920.jpg)
BA.2 is like Omicron's sister. Here's what we know so far - UQ News - The University of Queensland, Australia
![Covid Ba2 Variant: What is the new COVID-19 variant BA.2, and will it cause another wave of infections in the US? - The Economic Times Covid Ba2 Variant: What is the new COVID-19 variant BA.2, and will it cause another wave of infections in the US? - The Economic Times](https://img.etimg.com/thumb/width-1200,height-1200,imgsize-72676,resizemode-75,msid-90418070/news/international/world-news/what-is-the-new-covid-19-variant-ba-2-and-will-it-cause-another-wave-of-infections-in-the-us.jpg)
Covid Ba2 Variant: What is the new COVID-19 variant BA.2, and will it cause another wave of infections in the US? - The Economic Times
![SARS-CoV-2 Omicron variant: recent progress and future perspectives | Signal Transduction and Targeted Therapy SARS-CoV-2 Omicron variant: recent progress and future perspectives | Signal Transduction and Targeted Therapy](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41392-022-00997-x/MediaObjects/41392_2022_997_Fig1_HTML.png)
SARS-CoV-2 Omicron variant: recent progress and future perspectives | Signal Transduction and Targeted Therapy
![Protection of COVID-19 vaccination and previous infection against Omicron BA.1, BA.2 and Delta SARS-CoV-2 infections | Nature Communications Protection of COVID-19 vaccination and previous infection against Omicron BA.1, BA.2 and Delta SARS-CoV-2 infections | Nature Communications](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41467-022-31838-8/MediaObjects/41467_2022_31838_Fig1_HTML.png)
Protection of COVID-19 vaccination and previous infection against Omicron BA.1, BA.2 and Delta SARS-CoV-2 infections | Nature Communications
![Infection with Omicron sub-lineage BA.1 protects from reinfection against BA.2 sub-lineage and vice-versa Infection with Omicron sub-lineage BA.1 protects from reinfection against BA.2 sub-lineage and vice-versa](https://d2jx2rerrg6sh3.cloudfront.net/image-handler/picture/2022/3/shutterstock_2113587182.jpg)
Infection with Omicron sub-lineage BA.1 protects from reinfection against BA.2 sub-lineage and vice-versa
![New MUSC COVID data show rise of BA.2 subvariant and its offshoot, BA.2.12.1 | MUSC | Charleston, SC New MUSC COVID data show rise of BA.2 subvariant and its offshoot, BA.2.12.1 | MUSC | Charleston, SC](https://web.musc.edu/-/sm/news-center-media/news-center-images/2022-images/05/sequencing-april-2022.jpg?h=666&w=1000&la=en&hash=A5A87A362AAD24A27FC77555A3022E0D)