A COVID-19 test and a mask are displayed at a home in Washington, D.C., on Jan. 5, 2024.
he COVID-19 lull in the U.S. may soon come to an end, as a new family of SARS-CoV-2 variants—nicknamed “FLiRT” variants—begins to spread nationwide.. They’ve been dubbed “FLiRT” variants based on the technical names for their mutations, one of which includes the letters “F” and “L,” and another of which includes the letters “R” and “T.”
Within the FLiRT family, one variant in particular has risen to prominence: KP.2, which accounted for about 25% of new sequenced cases during the two weeks ending Apr. 27,from the U.S. Centers for Disease Control and Prevention . Other FLiRT variants, including KP.1.1, have not become as widespread in the U.S. yet.
Researchers are still learning about the FLiRT variants, and many questions remain about how quickly they’ll spread, whether they’ll cause disease that’s more or less severe than what we’ve seen previously, and how well vaccines will stand up to them. Here’s what we know so far.Despite KP.2's rise in the U.S., it’s too soon to tell whether the FLiRT family will be responsible for a major surge in cases, says Dr.
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