Nearly 300 cases of a rare, life-threatening syndrome in children and adolescents associated with the novel coronavirus have been identified in the United States in two studies in The New England Journal of Medicine.
The US studies published on Monday (June 29) follow several reports of the syndrome among Covid-19 patients in France, Italy, Spain and Britain.
Multisystem Inflammatory Syndrome in Children (MIS-C), shares symptoms with toxic shock and Kawasaki disease, including fever, rashes, swollen glands and, in severe cases, heart inflammation.
A consistent picture is emerging of the syndrome occurring two to four weeks after infection by the coronavirus, Michael Levin, professor of paediatrics and international child health at Imperial College London, said in an accompanying editorial.
The syndrome affects 2 in 100,000 young people, defined as under age 21, out of 322 in 100,000 in that group who get Covid-19, he wrote.