Rates of MIS-C were expected to rise following the delta variant wave in the summer. Doctors are seeing fewer MIS-C cases than in previous surges.
But following that delta-driven surge,"there are fewer cases than we would expect," said Dr. Roberta DeBiasi, chief of infectious diseases at Children’s National Hospital in Washington, D.C."The time that delta was dominant also happened to coincide with when we had a lot of kids vaccinated," DeBiasi said.in May, just before the delta variant took hold in the United States.
Creech, of Vanderbilt, hypothesized that the lower MIS-C rates could be tied to the delta variant itself. Different variants could have different tendencies to cause MIS-C, and"maybe there's something about the spike protein or some other part of the virus that triggers MIS-C" in other variants, but not as much with delta, he said.
Dr. Sean O'Leary, vice chair of the committee on infectious diseases for the American Academy of Pediatrics, stressed that MIS-C has not gone away. And while the rates of overall MIS-C cases declined, physicians at some major facilities — particularly in the Southeast, which was particularly hit hard during the delta variant surge and whereDr.
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