Final answer:
AIDS is the late stage of HIV when the virus damages the body's immune system. HIV is transmitted through various means and primarily attacks the CD4+ T cells.
Step-by-step explanation:
AIDS
Acquired immunodeficiency syndrome (AIDS) is the late stage of the human immunodeficiency virus (HIV) when the virus badly damages the body's immune system. HIV infection is transmitted through sexual activity, blood transfusion, mother to child, etc., and primarily destroys CD4+ T cells, components of the human immune system.