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  1. All Diseases and Conditions | NIAMS

  2. Medical Diseases & Conditions - Mayo Clinic

  3. Disease - Wikipedia

  4. Infectious Disease: Types, Causes & Treatments - Cleveland Clinic

  5. Infectious diseases - Symptoms & causes - Mayo Clinic

  6. Health A to Z - Harvard Health

  7. Disease | Definition, Types, & Control | Britannica

  8. Diseases - World Health Organization (WHO)

  9. Communicable diseases: Types, symptoms, prevention, and …

  10. Noncommunicable diseases - World Health Organization (WHO)