Human immunodeficiency virus. infects and destroys immune cells and causes AIDS.

By destroying CD4 cells, this virus makes the immune system weak and the body susceptible to disease from infection, ultimately leading to AIDS in the majoritiy of untreated individuals.

Human immunodeficiency virus. a virus causing acquired immune deficiency syndrome (AIDS) that is transmitted by sexual intercourse and blood and blood products. AIDS is associated with a high risk of Kaposi's sarcoma, non-Hodgkin's lymphoma and other lymphatic cancers.

a virus that weakens the immune system to the point where an infected person develops AIDS and can no longer fight off opportunistic infections or disease