| AI | accidental injury; accidentally incurred; adiposity index; aggregation index; allergy and immunology... |
|---|---|
| AI-CAH | autoimmune-type chronic active hepatitis |
| AIHA | American Industrial Hygiene Association; autoimmune hemolytic anemia |
| AITP | autoimmune idiopathic thrombocytopenic purpura |
| AMEAE | acute monophasic experimental autoimmune encephalomyelitis |