Foodborne illness | Terminal illness | psychosomatic medicine | National Alliance on Mental Illness | Thank God For Mental Illness | terminal illness | Integrated Management of Childhood Illness | Illness or Modern Women | Heat illness | ''Great and Desperate Cures: The Rise and Decline of Psychosurgery and Other Radical Treatments for Mental Illness'' | Franklin D. Roosevelt's paralytic illness |
Pre-existing theories of disease: Before a pathogen is well-recognized, scientists may attribute the symptoms of infection to other causes, such as toxicological, psychological, or genetic causes.