Pathology
- athletes heart
- Atopic Dermatitis
- Atrial Septal Defect
- atrophy
- autism
- autoimmune
- Autoimmune diseases
- Automatism
- Autosuggestion
- Avitaminosis
- Babesiosis
- Baby Bottle Tooth Decay
- Bacillary dysentery
- Bacteremia
- Bacterial Artificial Chromosome (BAC)
- Bacterial conjunctivitis
- Bacterial infections
- Bacterial proteins
- Bacterial Vaginosis
- Bad Breath