COVID-19 may be tied to rare syndrome in children, UK doctors warn

Children have been thought to be largely spared from the worst of the new coronavirus, but doctors in the U.K. are now warning of a possible connection between COVID-19 and an unusual inflammatory syndrome in children. 

However, experts stress that serious illness related to COVID-19 in children is still very rare overall.

The warning came over the weekend, when the National Health Service (NHS) England issued an alert notifying doctors of a small but growing number of cases of “multisystem inflammatory” disease in children that required intensive care, according to the U.K. Paediatric Intensive Care Society. Some of these children have tested positive for COVID-19, although others have not.

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The alert noted that these cases showed symptoms similar to those found in two rare conditions: toxic shock syndrome and Kawasaki disease. Toxic shock syndrome is a life-threatening condition that’s caused by toxins produced by certain types of bacteria; Kawasaki disease is a childhood illness that causes inflammation in blood vessel walls, and in serious cases can cause heart damage.

Some of the symptoms in the U.K. cases included fevers, severe abdominal pain and skin rashes, along with markers of severe inflammation in the blood, The Guardian reported. Some of these children have also needed treatment for heart inflammation.

So far, the inflammatory syndrome appears rare — only about a dozen children in the U.K. have been reported to have the syndrome, according to The Guardian. 

Similar cases have also been reported in Spain and Italy, according to CNN. And in the United States, doctors at Stanford University recently published a case report in the journal Pediatrics describing a 6-month-old infant who was diagnosed with Kawasaki disease and COVID-19.

A connection between Kawasaki disease and COVID-19 wouldn’t necessarily be surprising, said Dr. Courtney Gidengil, a senior physician policy researcher at RAND Corp. and a pediatric infectious disease specialist in Boston, who is not involved with the U.K. cases. The cause of Kawasaki disease isn’t known, but one of the leading theories is that it may be triggered by infections with common viruses, she said.

“It wouldn’t be totally surprising if COVID might do the same thing” in terms of triggering the disorder, Gidengil told Live Science. She also noted that, although we’re learning more about COVID-19 every day, it seems like one of the hallmarks of the disease is inflammation, including a “cytokine storm,” or an aggressive immune system reaction that can damage the body’s organs. This feature would also fit with NHS England’s description of the inflammatory syndrome as cases involving uncontrolled inflammation.

However, it’s still too early to say that COVID-19 is behind this inflammatory syndrome in children, Gidengil said. More data will be needed to show this. Indeed, the NHS alert noted the possibility that another, yet-to-be-identified pagothen is associated with the inflammatory syndrome. 

Still, “it’s great that they’re raising an alarm about this so people can be aware,” Gidengil said.

Although this news might sound worrisome to parents, reports of serious COVID-19 complications remain uncommon in children. “It’s really important to just keep in mind that it’s still really rare for kids to have complications from COVID at this point,” Gidengil said.

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Originally published on Live Science.  

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