- Safety
- Salmonella Food Poisoning
- Sarcomas
- Savant Syndrome
- Scabies
- Scarlet Fever
- Schizophrenia
- School Phobia/School Refusal
- Scoliosis
- Seborrheic Dermatitis
- Security Objects
- Seizure Disorder
- Self-Esteem
- Self-Mutilation
- Separation Anxiety
- Severe Combined Immunodeficiency
- Sexually Transmitted Diseases
- Shaken Baby Syndrome
- Shigellosis
- Shyness
- Sibling Rivalry
- Sickle Cell Anemia
- Single-Parent Families
- Sinusitis
- Skeletal Development
- Sleep
- Sleep Disorders
- Smoke Inhalation
- Smoking
- Social Competence
