Q: I recently made a trip to Bangkok with my friends and slept with a prostitute. I used a condom but some how in the middle of the intercourse, I took out the condom due to less erection and after 10 minutes used the same condom again (inverted) and then had sex for 2 minutes until I ejaculated. How prone am I to HIV infection? It has been 2 days now before this incident took place. What should I do?

A:The chances of getting HIV infection are quite high. Since antibodies to HIV are detectable six to eight weeks after exposure, the only test that could detect HIV infection at this stage is polymerase chain reaction assay. Here I will like to suggest: 1. Get a base line test for HIV antibodies now to get any base line information. 2. If negative, get PCR assay for HIV proviral DNA in peripheral blood mono-nuclear cells. However, I will like to inform you that this test should be done at following intervals: 2 weeks, 4 weeks and 6 weeks after the exposure. 3. Avoid donating blood during this period. 4. Follow total sexual abstinence until you are negative.