Why AIDS is called killer disease?

AIDS disease is caused by the human body by the attack of a virus named HIV (Human Immune Deficiency Virus). This virus destroys white blood cells, causing obstacles in antibody formation, which results in the gradual shortage of white blood cells and antibodies. In the human body, this virus can remain dormant for a long time. It destroys the victim's immune system. There is no effective medicine discovered to regain the immune system completely, so the ultimate fate is death. Hence this is called a killer disease.