The CDC says this delightfully named disease “is a common viral illness that usually affects infants and children younger than five years old,” although it does occasionally shows up in [gigantic Thor-looking] adults. It starts with a fever, a sore throat, and “a feeling of being unwell,” and eventually progresses to include little red sores around the mouth and on the feet. It should clear up in a matter of days, but someone should warn Syndergaard that the feeling of being unwell will last for exactly as long as he is a member of the Mets.