Possible Hiv infection in twelve year old boy

Dear Ask The Doctor: My 12 year old patient (i am his psychologist) has been in ICu for the past week. the doctors did an HIv test where he tested positive. he is not sexually active, he has never had a blood tansfusion, his mother is HIv negative, no history of drug abuse. he said that when he was 5 another 5 year old molested him but he does not recall penetration. could he have transmitted HIv through this manner or is it possible the test was a false positive

Dear Orit: Around the world approximately 40 million people are currently living with HIV infection, and an estimated 25 million have died from this disease. In the United States, roughly one-third of new diagnoses appear to be related to heterosexual transmission. Male-to-male sexual contact still accounts for nearly half of new diagnoses and intravenous drug use make the remaining of the cases. The virus does not spread through casual contact such as preparing food, sharing towels and bedding, or via swimming pools, telephones. The virus is also unlikely to be spread by contact with saliva, unless it is contaminated with blood. Many people do not show symptoms after they first get infected with HIV. Others have a flu-like illness within several days to weeks after exposure to the virus. HIV infection is commonly diagnosed by blood tests that detect antibodies the immune system produces in an attempt to fight the virus. Testing for HIV is a two-step process: first, an inexpensive screening test (blood) or oral (saliva) is done. If that test is positive, a second test (Western blot) is done to confirm the result. Yes, it is possible a false positive that’s why I suggest  repeating the screening test and do the confirmatory one on your son.