Health officials report uptick in children's rare COVID-related inflammatory syndrome following delta surge

A number of pediatric hospitals across the country are now warning about an increase in the number of children developing MIS-C.

A number of pediatric hospitals across the country are warning about an increase in the number of cases of multi-system inflammatory syndrome in children, a rare condition in which different parts of the body, including the heart, lungs, kidneys, brain, skin, eyes or gastrointestinal organs, become inflamed.

MIS-C, which most often appears four to six weeks after a COVID-19 infection, can be serious and potentially deadly, but most children who are diagnosed with it recover with medical care, according to the Centers for Disease Control and Prevention.

Federal data shows that there have been at least 46 confirmed MIS-C deaths and 5,217 confirmed MIS-C cases -- and about 61% of the reported cases have occurred in children who are Hispanic/Latino or Black. Children between the ages of 6 to 11, who may soon be eligible for a COVID-19 vaccine, have reported the highest number of MIS-C cases since the onset of the pandemic.

Nearly 5.9 million children have tested positive for COVID-19, and MIS-C infections represent only 0.0009% of COVID-19 pediatric cases. However, between July and August, the average number of daily MIS-C cases nearly doubled.