A 19-year old man with IgA vasculitis after vaccination.

A 19-year-old patient who mistakenly received two doses of influenza vaccine 10 days before presentation, was admitted with malaise, weakness, and a purpuric non-blanching rash most prominent on the ankles followed by abdominal pain and hematochezia 72h later. The diagnosis of influenza vaccine-related Henoch-Schonlein vasculitis was made. This complication, although rare, is the most common vasculitis related to immunization.