Hi 19 HIV QUESTION our test is single use therefore you cannot re-test using the same test. The accuracy of our test never changes however a negative test can only be relied on 12 weeks post exposure due to the nature of individuals immune systems (a positive test can always be relied on). The BioSURE HIV self test looks for antibodies to the virus rather than the antigen itself therefore we need to ensure that the individual testing has produced the antibodies. At 4 weeks 50% of people would have produced antibodies to HIV, therefore generating a positive line, at 6 weeks this increases to 95% of people and at 12 weeks this is 99.9% of people. I hope this makes sense however please don't hesitate to contact me further. Kindest regards Francesca Bard, BioSure (UK) Ltd

Can a test be reused, providing you can supply blood without another lancet. How reliable is a test after 3-4 weeks How reliable is a test at 7 weeks

Hi realy panic Thanks for getting in touch. Firstly, don't panic. I know that HIV can be a scary thing, but regardless of the outcome you are taking the right steps to determine your HIV status. HIV once diagnosed is a completely treatable condition. On treatment the infection will not progress and will quickly become controlled so that you cannot pass the infection on. Secondly, the incident described would be extremely low risk. Lastly, your negative test is extremely encouraging. At 7 weeks around 95% of people would have created the antibodies for the BioSURE HIV Self Test to work. Your negative result is extremely encouraging. To be absolutely certain you should retest at 12 weeks. I hope that this answers your question. Kind regards Gary Carpenter BioSure (UK) Limited