| HTLV-MA | cell membrane antigen associated with the human T-cell leukemia virus |
|---|---|
| HTLV-I-MA | human T-cell leukemia virus-I-associated membrane antigen |
| Ia | immune response gene-associated antigen |
| IAHS | infection-associated hemophagocytic syndrome; International Association of Hospital Security |
| IDAV | immunodeficiency-associated virus |