 Human being have been challenged with different diseases from time to time. The cause of this diseases are virus , bacteria , fungi and etc. A diseases caused by virus , the Acquired Immune Deficiency Syndrome AIDS is very challenging to this century . By the end of 2008, UNAIDS world health organization WHO estimated that globally, a total of 33.4 million people were living with HIV, where by 31.3 million were adults. In sub-Saharan Africa, 22.4 million people were living with HIV in 2008 . Of these on 15.8 million were under anti-retro viral therapy ART to Jun, 2015 and 1.2 mill people died with AIDS related illnesses till end of the 2014 . 