HIV stands for the Human Immunodeficiency Virus. The virus targets immune cells (predominantly CD4+ T cells and macrophages), thereby weakening the body’s immune system. As a result, people living with HIV are often more susceptible to other infections as the body cannot properly protect itself.
Once a person has very few CD4+ T cells, they are deemed to have developed AIDS. AIDS stands for Acquired Immunodeficiency Syndrome. AIDS describes a collection of potential infections and symptoms linked to a poor immune system due to HIV infection.