HALE (health-adjusted life expectancy)

HAM-D (Hamilton Rating Scale for Depression)

HAMA (Human anti-mouse antibody)

HAMRSA (healthcare associated with MRSA)

HAP (hospital-acquired pneumonia)

HAPE (high-altitude pulmonary edema)

HAQ (health assessment questionnaire)

HAV (hepatitis A virus)

HAZMAT (hazardous materials)

HAZOP (hazard and operability)