CDC Yellow Book
- abatacept (Orencia) [table]
- abdominal pain, fever with [table]
- abscesses, skin [table]
- ACAA (Air Carrier Access Act)
- acaricide
- ACEP (American College of Emergency Physicians)
- ACS (American College of Surgeons)
- Actemra (tocilizumab) [table]
- acupressure
- acute illness, vaccines and
- acute stress disorder (ASD)
- adalimumab (Humira) [table]
- adenovirus [table]
- adjuvants
- AE (alveolar echinococcosis)
- Afghanistan
- African trypanosomiasis
- aid workers
- airborne allergies
- airborne infections
- Air Carrier Access Act (ACAA)
- aircraft boarding, for people with disabilities
- airports, accessibility in
- Albania
- algal blooms, harmful [map]
- Algeria
- alkylating agents
- alum powder
- alveolar echinococcosis (AE)
- AMA (American Medical Association)
- Amazon River
- AmBisome (amphotericin B)
- American Academy of Orthopaedic Surgeons
- American College of Emergency Physicians (ACEP)
- American College of Surgeons (ACS)
- American Medical Association (AMA)
- American Samoa (US)
- American Society for Aesthetic Plastic Surgery (ASAPS)
- American Society of Plastic Surgeons (ASPS)
- American trypanosomiasis
- aminoglycosides
- amnesic shellfish poisoning
- amphotericin B (AmBisome)
- anakinra (Kineret) [table]
- Andorra
- aneruptive fever [table]
- angiostrongyliasis, neurologic
- Anguilla (UK)
- animal health certificates
- animal products
- Antarctica
- anthrax
- antidotes to chemical warfare
- antiemetics
- Antigua and Barbuda
- antimetabolites
- Aplisol
- Arba’een pilgrimage [table]
- Arcalyst (rilonacept) [table]
- arenaviral diseases
- Armenia
- aromatherapy
- artemisinin derivatives
- arterial gas embolism
- arthralgia, fever and [table]
- Arzerra (ofatumumab) [table]
- ASAPS (American Society for Aesthetic Plastic Surgery)
- ASD (acute stress disorder)
- asplenia
- ASPS (see American Society of Plastic Surgeons)
- assignees [table]
- assistive equipment
- atezolizumab (Tecentriq) [table]
- Austral Islands
- Avastin (bevacizumab) [table]
- avelumab (Bavencio) [table]
- Avonex (interferon beta-1a, Rebif) [table]
- Azores (Portugal)