A rare, Kawasaki-like disease is striking kids who have coronavirus antibodies, a Lancet study from Italy shows. Doctors in 15 US states are reporting that at least 164 children have fallen sick with a rare inflammatory illness similar to a condition known as Kawasaki disease. Symptoms include fever and inflammation and can affect organs, including the heart. Some of the children have tested positive for Covid-19 or have antibodies to the virus, and three have died.