A chronic disease named HIV-AIDS is caused by HIV virus. Due to this virus, human immune system is damaged as a result of which immune system becomes weak and their ability of fighting with organism is lost causing disease. Most often, HIV-AIDS is caused through unprotected sex with the person having HIV infection. Additionally, HIV-AIDS can be also be caused through HIV infected mother to child at the time of pregnancy, and also sharing needles as well as infected blood among people infected with HIV-AIDS. Few symptoms of HIV include swollen glands, headaches, slight fever, muscle aches, and fatigue.