Omicron subvariant BA.2

下記の記事が出ている。

　Omicron subvariant BA.2 continues global rise as experts assess mixed data
　ars technica: February 19, 2022
　https://arstechnica.com/science/2022/02/omicron-subvariant-ba-2-worrying-lab-results-but-comforting-real-world-data/