<prompt> Which of the following is associated with highest risk of HIV transmission?Blood transfusionDisposable needle prickSexual transmissionMother to baby  <response>: Ans. a Blood transfusion. Ref. Park, PSM, 18th ed., 98, 338 Among all sources of HIV heterosexual promiscuity are major route and 85 HIV infections occur due to unprotected and multiple sexual contacts with the risk of 0.3 to 3. The highest risk of HIV transmission is with blood transfusion 90-95. 