Hi FloydRose1 Thanks for your question. At 108 days post exposure you can consider a negative test to be conclusive. I would not recommend the need for additional testing. Condom use is an excellent preventative measure against the transmission of HIV. I hope that this answers your question. Kind regards Gary Carpenter BioSure (UK) Limited

Hello, I have had a test 108 days (15.4 weeks) after exposure (i also used a condom). The test came back negative (one line on the test). Should i accept this result or is more testing needed?

Dear Doctor To keep you updated I did another test at 5 weeks (35 days) and this was also negative so based on this being three weeks after onset of symptoms and 90 percent probability it appears very unlikely I am infected. Kind regards

Thanks for quick response doctor. I assume I am ok then as symptoms started at 14 days post exposure and had negative biosure tests more than two weeks after. However I will retest at the 12 week mark as suggested to be sure. Kind regards

Hi Tony Thanks for getting in contact. You are right about seroconversion illness and the time to test. An antibody test will always be positive 2 weeks after the onset of seroconversion illness. By 31 days we estimate that at least 80% of people would have created enough antibodies for the BioSURE HIV Self Test to be positive. So your series of negative test results are extremely encouraging. To be absolutely certain that you can put this behind you we would advise another test at around the 12 week mark post exposure. To reiterate this is just to be absolutely certain. I hope that this answers your question. Kind regards Gary Carpenter BioSure (UK) Limited