HIV, or Human Immunodeficiency Virus, is a virus that attacks the body’s immune system, specifically the CD4 cells. Without treatment, HIV can progress to AIDS (Acquired Immunodeficiency Syndrome), the most advanced stage where the immune system is severely compromised. HIV is transmitted through specific bodily fluids, including blood, semen, vaginal fluids, and breast milk. While there is no cure for HIV, it is a manageable chronic condition with effective treatment.