| HAP | Handicapped Aid Program; Hazardous Air Pollutants [List]; hazardous air pollution; health alliance p... |
|---|---|
| HAPA | hemagglutinating anti-penicillin antibody |
| HAT | Halsted Aphasia Test; head, arm, trunk; heparin-associated thrombocytopenia; heterophil antibody tit... |
| HBAb | hepatitis B antibody |
| HBSAg | IgG antibody to HBsAg |