The XBB.1.5 variant is spreading quickly in the U.S. and the bivalent booster appears to be ineffective at stopping the spread. Keep in mind the bivalent booster was tested on XA.1 and XA.5 where it was found effective at stopping severe illness and somewhat effective at stopping infection. However XBB.1.5 is significantly different than XA.1 -- to the point where is should be considered its own major strain (in the way that alpha and delta were different) except for the fact there is a defined inheritance path back to the original Omicron for XBB.1.5.
Highly immune evasive omicron XBB.1.5 variant is quickly becoming dominant in U.S. as it doubles weekly
https://www.cnbc.com/2022/12/30/cov...immune-evasive-and-binds-better-to-cells.html
A new COVID variant is spreading quickly across New England, and the bivalent booster doesn’t seem able to stop it
https://www.courant.com/news/connec...0230106-sw7da5wqjfhe7fpbv7a53mpd4e-story.html
Highly immune evasive omicron XBB.1.5 variant is quickly becoming dominant in U.S. as it doubles weekly
https://www.cnbc.com/2022/12/30/cov...immune-evasive-and-binds-better-to-cells.html
- The Covid omicron XBB.1.5 variant has nearly doubled in prevalence over the past week and now represents about 41% of new cases in the U.S., according to CDC data.
- XBB.1.5 is highly immune evasive and appears to bind better to cells than other members of the XBB omicron subvariant family.
- Scientists at Columbia University have warned that the rise of subvariants such as the XBB family could “result in a surge of breakthrough infections as well as re-infections.”
A new COVID variant is spreading quickly across New England, and the bivalent booster doesn’t seem able to stop it
https://www.courant.com/news/connec...0230106-sw7da5wqjfhe7fpbv7a53mpd4e-story.html