According to cnn website reported on the 22nd, with the arrival of February, the United States seems to have "survived" the wave of infection in Omicroon, and the new cases have dropped by 90% compared with the pandemic record set five weeks ago. But U.S. doctors worry that as Aumicon set a record number of infections among U.S. children in January, another multisystem inflammatory syndrome (commonly known as MIS-C) triggered by COVID-19 may be on the horizon in the coming days.

MIS-C may occur even a few weeks after infection with COVID-19. It causes inflammation in certain parts of the body and affects major organs, including the kidneys, brain, lungs, and heart.
MIS-C symptoms are not uniform, but may involve abdominal pain, vomiting, diarrhea, rash, conjunctivitis, and hypotension. It usually occurs after mild or even asymptomatic cases of COVID-19.
The Centers for Disease Control and Prevention tracks MIS-C cases, but only updates the numbers on its website once a month. As of 31 January, 6,851 CASEs of MIS-C have been reported during the pandemic.
Most MIS-C cases aren't fatal, but just last week, the Wisconsin Department of Health Service reported that a 10-year-old child in the southeastern state had died of MIS-C in the past month.
At Colorado Children's Hospital, about two to three cases of MIS-C are seen each week. At Children's Hospital in Los Angeles, they are also keeping a close eye on the number of patients, but so far, there have been no abnormalities.
At UH Rainbow Infant and Children's Hospital in Cleveland, MIS-C cases appear to be occurring much faster after a surge in Infections in Omicron.
At Seattle Children's Hospital, mis-C numbers also surged. "About 15% of the total number of MIS-C cases we have seen since January 2020 occurred in mid-December 2021, when Omi kerong became the main variant. These numbers indicate that MIS-C increases with the increase of Omicron. Portman, director of research in the Department of Cardiology, wrote in an email to CNN.
Texas Children's Hospital in Houston reached a peak of infections on Jan. 7. Since the beginning of the pandemic, the hospital has treated more than 280 cases of MIS-C, two-thirds of whom are in severe condition requiring intensive care.
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