Absolute Contraindication

Acanthosis Nigricans

Acquired Immunity

Acquired Immunodeficiency Syndrome (AIDS)

Acquired Resistance

Active Immunity

Acute HIV Infection

Acute Infection and Early Diseases Research Program (AIEDRP)

Acute Inflammatory Demyelinating Polyneuropathy

Acute Retroviral Syndrome

Adenopathy

Adenovirus

Adherence

Adjuvant

Adverse Drug Reaction (ADR)

Adverse Event (AE)

Agammaglobulinemia

Agency for Healthcare Research and Quality (AHRQ)

Agranulocytopenia

AIDS Case Definition

AIDS Clinical Trials Group (ACTG)

AIDS Dementia Complex (ADC)

AIDS Drug Assistance Programs (ADAPs)

AIDS Education and Training Centers (AETCs)

AIDS Encephalopathy

AIDS Service Organization (ASO)

AIDS-Defining Condition

AIDSinfo

AIDS-Related Cancer

Alanine Aminotransferase (ALT)

Alanine Transaminase

Albumin

Albuminuria

Alkaline Phosphatase (ALP)

Alopecia

American Trypanosomiasis

Amino Acids

Anemia

Antenatal

Antepartum

Antibiotic

Antibody

Antibody Differentiation Test

Anticoagulant

Antifungal

Antigen

Antigen/Antibody Combination Test

Antigen-Antibody Complex

Antigen-Presenting Cell (APC)

Antineoplastic

Antiprotozoal

Antiretroviral (ARV)

Antiretroviral Pregnancy Registry

Antiretroviral Therapy (ART)

Antiretroviral Toxic Neuropathy

Antisense Antiviral

Antiviral

Aphthous Ulcer

Apoptosis

Approved Drug

Area Under the Curve (AUC)

Arm

Arrhythmia

Arthralgia

Artificial Insemination

Aspartate Aminotransferase (AST)

Aspergillosis

Assembly

Asthenia

Asymptomatic HIV Infection

Ataxia

Atherosclerosis

Attachment

Attenuated

Autoimmune Disorder

Avascular Necrosis (AVN)