The Centers for Disease Control and Prevention made its first definitive statement last week describing a rare but disturbing condition in children related to Covid-19. Doctors in the U.K. first reported in April a spike in previously healthy children presenting with features similar to another rare condition, Kawasaki disease, whose symptoms include rash and fever and, later in its progression, inflammation of blood vessels. This is a reminder of how much we don’t know about Covid-19. We’ve learned a lot over the past two...

Source: Wall Street Journal May 17, 2020 18:00 UTC