title: [Case of skin ulcer due to influenza HA vaccination].
mesh_terms: D002648:Child; D006801:Humans; D009980:Influenza A virus / Q000276:immunology; D007252:Influenza Vaccines / Q000009:adverse effects*; D008297:Male; D012882:Skin Tests; D012883:Skin Ulcer / Q000209:etiology* / Q000473:pathology
chemical_list: D007252:Influenza Vaccines