All around the world persons living with HIV/AIDS faces many problems in their society. In this paper, the threshold of the HIV plays a major role in the progression of infection. The important characteristic of the threshold level of patients for a person is considered. The patients may dead when the total amount of antigenic diversity exceeds a threshold level. Mathematical model is obtained for the expected life time of AIDS PATIENTS by using Burr Type X distributions. The Data collected in four places namely Pondicherry, Trichy, Nanamakal and Coimbatore regions and fitted for this model.
