#17,132
These numbers are estimates based on limited surveillance, and previous week's numbers are often revised, meaning that even though this is the first mention of XBB, today's graphic shows it has been circulating here at very low levels for several weeks.
We continue to see an erosion in our armamentarium of effective monoclonal antibody treatments, however, and the duration and degree of protection from current vaccines against these emerging variants remains to be seen.
Right now COVID is having to compete with the early arrival of RSV and influenza, and a process known as `viral interference' may be inhibiting some of its spread (see EID Journal Perspective: Viral Interference Between Respiratory Viruses).
How much of an impact that may be having, and how long it might last, remain to be seen.
BQ.1 and BQ.1.1 are currently poised to be the dominant strains in the US this winter, but with XBB, BN.1, and BA.2.75 all gaining ground, it impossible to say what the COVID landscape will look like 90 days from now.