DiseaseFix list of diseases & conditions - Your ultimate guide of diseases , syndromes and health conditions. Know about Causes Symptoms Diagnosis Treatment Complications Prevention, and much more through articles and graphics A to Z A to Z list of common illnesses and conditions including their symptoms, causes and treatments The concept of diseases is essential in biology and helps explain real-world biological processes, health issues, and exam-level questions effectively. Understanding Diseases Diseases refer to any harmful deviation from the normal state or functioning of a living organism, usually shown by specific signs or symptoms. This concept is important in areas like disease classification, causes and prevention, and communicable versus non-communicable diseases . Understanding diseases is vital for ... Index of comprehensive articles on medical diseases and conditions , a listing. Covers all aspects of medicine produced by doctors.