Mean transformation time for HIV to AIDS is:-

Epidemiologic studies in the United States have identified five groups of adults at high risk for developing AIDS Homosexual or bisexual men (constitute the largest group, accounting for more than 50% of the repoed cases. This includes about 5% who were intravenous drug abusers as well. Transmission of HIV in this category appears to be on the decline: in 2009 about 60% of new cases were attributed to male homosexual contacts). Intravenous drug abusers Recipients of blood and blood components Hetero sexual contacts HIV infection of the newborn. Sexual transmission (Sexual transmission of HIV is enhanced by co-existing sexually transmitted diseases, clearly the dominant mode of infection worldwide, accounting for more than 75% of all cases of HIV transmission) Parenteral transmission