There are four main types of disease: infectious diseases, deficiency diseases, hereditary diseases, and physiological diseases. Diseases can also be classified in other ways, such as communicable versus …

Explore comprehensive guides on hundreds of common and rare diseases and conditions from the experts at Mayo Clinic.

May 8, 2026 · disease, any harmful deviation from the healthy structural or functional state of an organism, generally associated with certain signs and symptoms and differing in nature from physical …

Jun 1, 2025 · In medical science, disease is defined as a condition that disrupts normal bodily function and produces specific signs or symptoms. These disruptions can occur in any part of the body, from …

5 days ago · The meaning of DISEASE is a condition of the living animal or plant body or of one of its parts that impairs normal functioning and is typically manifested by distinguishing signs and …

A to Z list of common illnesses and conditions including their symptoms, causes and treatments.

Jun 24, 2026 · PCD is a peer reviewed journal covering research, public health findings, innovations, and practices on chronic diseases.