“We had a nice long break from those cases over the summer and even into the fall where we could get an occasional MIS-C case here and there, but in the last three or four weeks, there has definitely been an uptick. And I would anticipate that to continue through the next several weeks,” said Dr. Amy Edwards, an infectious disease specialist at UH Rainbow Babies & Children’s Hospital in Cleveland.
Doctors don’t know for sure what causes MIS-C. Often kids have Covid-19 first, but not always. For those few kids that do go on to develop MIS-C, the condition seems to inflame different parts of the body, and it can be serious.
At Children’s National in DC, the uptick in cases just started last week, according to Dr. Roberta DeBiasi, chief of the Division of Pediatric Diseases. This wave of new MIS-C cases hasn’t been as big as two surges earlier in the year where they saw up to about 60 MIS-C patients. For this wave, they’ve had about 18 MIS-C patients so far.
At Children’s Hospital Colorado, they too saw “significantly” more MIS-C cases in September, compared to previous months, according to Dr. Sam Dominguez, a pediatric disease expert at the hospital. But he said they aren’t seeing the same rates as they were seeing in December 2020 and January 2021.
The uptick in cases has not impacted the country evenly. Regions with smaller spikes in Covid-19 cases, such as Chicago, do not report an increase in MIS-C, according to Dr. Bill Muller, an infectious disease specialist at Ann & Robert H. Lurie Children’s Hospital of Chicago. “We did see a surge of Covid-19 cases with Delta, including increased hospitalizations, but it wasn’t anywhere near what the South had,” Muller said.
Doctors say that’s why vaccines are so important, even if the little children aren’t eligible to get a vaccine. The adults around them who can will help get the community’s case numbers down. If the number of Covid-19 cases are lower, there is a much smaller chance kids will develop MIS-C.
The kids that seem most vulnerable to MIS-C seem to share similar demographic traits. Most reported MIS-C cases were among children and adolescents between 5 and 13, with an average age of about 9, CDC said. More than half, 59%, were in males. MIS-C has disproportionately affected children of color. In its latest update, CDC said 61% of reported cases are in children who are Latino or non-Hispanic Black.
Edwards at UH Rainbow Babies & Children’s Hospital in Cleveland said a lot of the kids they treat for MIS-C had mild or even asymptomatic coronavirus infections first. She said that’s something for parents to keep in mind.
“Even if you’re not sure whether your kid had Covid, if they had mild symptoms after being exposed to somebody, but then they got better and then about a month later, they seem to be getting sick again, especially if they have a very high fever, I would err on the side of having them checked out sooner rather than later,” Edwards said. “What we know about MIS-C is the earlier you intervene, the less sick the kids seem to get.”