“FLiRT” COVID variants are now more than a third of U.S. cases. Scientists share what we know about them so far.
More than a third of COVID-19 cases in the U.S. are now estimated to be from a new, fast-growing member of a group of so-called “FLiRT” variants, nicknamed for their small but distinctive changes relative to the JN.1 strain. JN.1 was the variant behind this past winter wave of infections. The largest among them, called
Read More