There are a total of 838 Diseases that have been compiled and organized in this comprehensive list. The selection includes only recognized human diseases with established names and clinical significance, validated against WHO, CDC, ICD classifications, and major medical literature.

Diseases are conditions that impair normal body function and produce signs or symptoms. They range from acute infections and genetic disorders to chronic noncommunicable illnesses and rare conditions. Some are infectious, while others stem from genetics, lifestyle, environmental exposures, or aging. Understanding diseases supports diagnosis, public health planning, and treatment decisions.

Interesting and little-known facts about Diseases:
– Cardiovascular diseases were the leading cause of death worldwide, responsible for about 17.9 million deaths in 2019 (WHO).
– Noncommunicable diseases make up roughly 71% of all global deaths, with the greatest burden in low- and middle-income countries.
– There are over 7,000 rare diseases, collectively affecting about 300 million people worldwide, though most individual conditions are very uncommon.
– Antimicrobial resistance was linked to an estimated 1.27 million deaths directly attributable in 2019, posing a growing challenge to treating infections.
– The WHO issued naming guidelines in 2015 to avoid geographic or stigmatizing disease names and to promote neutral, descriptive terms.

Below is an alphabetical index that directs users to concise clinical summaries for each condition. Data columns include Name; Key symptoms (2–4 items); Causes and top risk factors; Typical treatments and referral notes; Clinician review status; and Source links (WHO/CDC/ICD/PubMed).