What are the new COVID FLiRT variants, and are they in Wisconsin?

KP.1.1 and KP.2, nicknamed FLiRT (pronounced “flirt”), are considered omicron variants, said University of Wisconsin-Madison professor of population health sciences Ajay Sethi. The “FL” and “RT” in the name refer to the mutations present in the variants that allow them to evade some of the immunity people have built up from past infections or vaccines.