<prompt> Risk of HIV transmission is not seen withWhole bloodPlateletsPlasma derived hepatitis B vaccineLeucocytes  <response>: Intravenous drug abusers with no history of homosex- ual behavior compose the next largest group, represent- ing about 17 of all patients. Recipients of blood and blood components but not hemophiliacs who received transfusions of HIV- infected whole blood or components e.g., platelets, plasma account for about 1 of patients. Hemophiliacs, especially those who received large amounts of factor VIII or IX concentrates before 1985, make up less than 1 of all cases. The epidemiology of HIV infection and AIDS is quite different in children diagnosed when younger than 13 years of age. About 1 of all AIDS cases occur in this population, and the vast majority about 90 result from veical transmission of virus from infected mother to the fetus or newborn Ref Robbins 9e P244 