The World Health Organization said Friday it was studying a possible link between COVID-19 and an illness similar to Kawasaki disease that has sickened and killed children in Europe and the United States. "Initial reports hypothesise that this syndrome may be related to COVID-19," WHO chief Tedros Adhanom Ghebreyesus told a virtual briefing, calling on clinicians worldwide to help "better understand this syndrome in children." nl/rjm/har