New York City Mayor Bill de Blasio has announced a plan to test all children with symptoms of a rare inflammatory condition for the coronavirus and its antibodies as dozens of cases have been identified across the country. In New York City, at least 38 children are sick and one has died from the mystery illness that doctors say share similar symptoms with Kawasaki Disease. Almost all have tested positive for coronavirus or the antibodies that reflect exposure to the virus. “To every parent out there: Early detection is the key to fighting this,” de Blasio said. “It can be treated. If you see these symptoms, take them seriously and act immediately.” Both Kawasaki disease and COVID-19 are elusive conditions that doctors are still studying. Some experts doubt there’s a link between the two, and others don’t believe the mysterious symptoms belong to Kawasaki at all.