- Three years after the novel coronavirus emerged, a new variant, XBB.1.5, is quickly becoming the dominant strain.
- A potent mix of mutations makes it easier to spread broadly.
- It includes those who have been previously infected or vaccinated.
XBB.1.5, pegged by the World Health Organization as “the most transmissible” descendant yet of the omicron variant, rose from barely 2 percent of U.S. cases at the start of December to more than 27 percent the...
https://mfame.guru/xbb-1-5-pegged-as-the-most-transmissible-variant/