Do I test again?
Hi – taken biosure test after possible exposure 5 years ago result came back as negative, I see on the forum people take more than one test for single exposure out of the three month window do you think this is necessary thanks.
None on 29th April 2019
I thought that you get overall probability by multiplying the two together. If that's true then the chances of 2 tests being wrong are very very small cos that is 2/1000 x 2/1000 which would be 4 in a million. So I reckon you really don't have to worry if 2 tests gave negative results. If it was me I would trust just one test. Good luck to you Bro/Sis - hope this helps.
Used on 25th April 2019
Hi all - Can you answer my question please about second test and false negative? I saw on the forum where Gary said a few posts ago about chance of a false negative on second test about 250.000 to 1 but on much earlier posts 1 million to 1 are mentioned. Why has this changed? thanks.
Used on 23rd April 2019
Thanks for reply I saw on forum that odds of a false negative are about 2 in a 1000 but if taking second test they increase to 1 in 250.000 but saw on earlier post back in 2016 odds on second test were 1 in a million is this true thanks
Francesca Bard, BioSure (UK) Ltd
Work on 23rd April 2019
Hi First test. There is no need to re-test given that your exposure was 5 years ago. It is only recommended to re-test if your exposure was less than 3 months before you tested. I hope this helps. Kindest regards Francesca Bard, BioSure (UK) Ltd