HIV stands for Human Immunodeficiency Virus. It affects only humans and weakens the immune system by targeting CD4 cells. It can be treated with antiretroviral medications (ARVs), that reduce the impact it has on our bodies. Currently, there is no cure for HIV. ARVs can make it possible to live with HIV for many decades.
AIDS stands for Acquired Immunodeficiency Syndrome. It may develop if we have had HIV for years and are not taking medications. It is preventable with HIV medications.