HIV stands for Human Immunodeficiency Virus. HIV weakens your immune system, and makes it much harder for your body to fight off infections. When HIV progresses, it can lead to Acquired Immune Deficiency Syndrome (AIDS). AIDS is a set of symptoms and specific illnesses—like infections and cancers. Fortunately, wonderful treatments exist to keep your immune system strong. By starting on treatment early and staying on it, HIV is now a manageable, chronic condition.