A 7-month-old male with severe hemophilia A (less than 1% factor VIII [FVIII] activity) presented to his pediatrician with fussiness and inability to sleep for 3 days. He had received his influenza vaccine 3 days earlier. What's the diagnosis?
Since late April, more and more cases of multisystem inflammatory syndrome in children (MIS-C) have been found around the United States. A report from Italy provides more information on how it differs from Kawasaki disease.