| AACIA | American Association for Clinical Immunology and Allergy |
|---|---|
| ACAAI | American College of Allergy, Asthma and Immunology |
| AI | accidental injury; accidentally incurred; adiposity index; aggregation index; allergy and immunology... |
| A&I | allergy and immunology |
| Al | allantoic; allergic, allergy; aluminum |