| AHLS | antihuman lymphocyte serum |
|---|---|
| AHTS | antihuman thymus serum |
| AIS | Abbreviated Injury Scale; amniotic infection syndrome; androgen insensitivity syndrome; anterior int... |
| ALS | acute lateral sclerosis; advanced life support; afferent loop syndrome; amyotrophic lateral sclerosi... |
| AMLS | antimouse lymphocyte serum |