A grandson of Ba.2 is taking over unusually rapidly

For the last six months or so, we have had a lot of Covid infections everywhere, and the dominant variant was Omicron Ba.5. This changed recently within about four weeks when a new clade called XBB.1.5 showed up and became the largest circulating variant nearly overnight.

Per CDC variant tracker:…………………………

https://igorchudov.substack.com/p/the-xbb15-variant-is-the-next-big