The AIDS epidemic refers to the widespread occurrence of Acquired Immunodeficiency Syndrome (AIDS), a disease caused by the Human Immunodeficiency Virus (HIV). This epidemic began in the late 20th century, particularly in the 1980s, and has affected millions of people globally. AIDS weakens the immune system, making individuals more susceptible to infections and certain cancers. Efforts to combat the AIDS epidemic include education, prevention strategies, and the development of antiretroviral therapies. Organizations like the World Health Organization (WHO) and UNAIDS work to provide resources and support for affected individuals. Despite significant progress, the epidemic continues to pose public health challenges in many regions.