Human Immunodeficiency Virus is retrovirus that can decrease immune system in human body. There are two types of HIV which could be genetically specified as HIV-I and HIV-2. HIV-I consists of three groups: M, N, and 0. The 'M' group is further classified as nine subtypes i. e, A, B, C, D, E, F, G, H, and I subtypes. In certain condition, two viruses from different subtypes can mix and form a hy…