A person has AIDS when the T-cell count falls below a measurement scale of 200, as opposed to the 500 to 1,500 in a healthy person. An extremely low CD4 count means that a person's immune system is no longer healthy enough to fight off intruding viruses and bacteria. Signs that HIV may be turning into AIDS include: extreme fatigue, rapid weight loss, persistent diarrhea, a high fever, and swollen glands in the neck, armpits, or groin.