Dear Doctor, please, 8 weeks after exposition I was on hiv dual test and test was negative - i was so happy. But doctor in Czech Republic told me, that it can be false negative - because i had an antibiotic 2 weeks before my test. I am now so depresed :-(. But you write, that antibiotic can´t affect hiv result. So i don´t know what is tru. Please can you explain it me? Many thanks A.