HIV (Human Immunodeficiency Virus) is a virus that attacks the immune system, and if untreated, can lead to AIDS (Acquired Immunodeficiency Syndrome), which is a condition characterized by a severely weakened immune system. The epidemic of HIV/AIDS has had a profound impact on health in various regions, particularly in Africa, where it has contributed significantly to mortality rates and has posed major health challenges alongside diseases like malaria and Ebola.