XBB.4 is a sub-strain of XBB. XBB.4 obtained a key mutation on the basis of XBB, while XBB.4.1 obtained a T470N mutation on the basis of XBB.4. Although this strain is not reported in the United States at present, it is suspected that it was introduced into the United States a few days ago according to our data.
Co-infection is a dangerous thing, especially mpxv and Covid-19, which can be recombined theoretically. The recombination of Omicron and Omicron is already a big risk, so it can be imagined how frightening it would be if mpxv were used to strengthen Covid-19.
CM.8.1 is a superior strain, and it has obtained two key mutations in the last two mutations, which may spread rapidly, and it is located near the seventh to eighth steps.