HIV or Human Immunodeficiency Virus is solely for humans. No dogs allowed, just you and me. It is a virus, in short, it's not hereditary. What does it do? It weakens our immune system, that after a time, we may not be able to ward off
infections and diseases. On the other hand, AIDS is Acquired Immune Deficiency Syndrome. "A" for "acquired" simply means that it's not genetically transported or inherited from parents. Immune Deficiency, because the immune system is destroyed, making us more susceptible as well as vulnerable to common ailments and infections. "S" for "syndrome" which means signs or symptoms. You develop AIDS from HIV and because of a frail internal combat, your body slowly fades away with no rigorous protection.