<prompt> Risk of HIV transmission after needle stick injury is ?0.300.5-12-310-20  <response>: The average risk for HIV infection after a needlestick or cut exposure to HlV-infected blood is 0.3.The risk after exposure of the eye, nose, or mouth to HIV-infected blood is estimated to be, on average, 0.1.The risk after exposure of the skin to HlV-infected blood is estimated to be less than 0.1. A small amount of blood on intact skin probably poses no risk at all.The risk may be higher if the skin is damaged for example, by a recent cut, if the contact involves a large area of skin, or if the contact is prolonged. 