Talking about home testing for HIV

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John Doe



False negative?

Almost two years ago used this test after having unprotected sex. Tested outside window period at like 16 weeks after sexual intercourse. Test came back negative. Took no medication and waited for 15 mins and saw one line which indicated a negative result. Furthermore, about a month ago, went for a full blood count and another blood test and doctor told me everything was normal (went for this due to different issue that concerned my bowel movements). With this being said, I still feel very anxious and all this talk of false negatives makes me nervous. Should I rely on my test that I took two years ago? knowing that my test was performed properly and was negative and that my blood test which included a full blood count came back normal?

1 Responses

Becky, BioSure UK Ltd
 Work on 15th March 2021

Hi JohnDoe, The fact that you tested outside of the window period, waited the full 15 minutes before reading your result, was not on any medication that could affect the result of the test and received a control line, suggests to me that you did everything correct and your result is accurate, reliable and conclusive. False negative results are uncommon but obviously do happen every once in a while, but we take every step to mitigate the risk of someone receiving one. It was assessed that the window period is a major factor for someone receiving a false negative result as the test's ability to be able to accurately detect infection is minimised if no antibodies have been produced at time of testing (within the 12 weeks). Your negative result using our test at 16 weeks is accurate and can be relied upon greatly, and your full blood count confirms this. I hope this helps, if you have any other queries, please feel free to leave them below. Thank you, Becky.

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