Thank you for your time in giving advice to people on HIV topic. Last week took an Abbott Combo 4th generation chemiluminescent Microparticle immunoassay test at 7 weeks and results came today Negative. I had multiple unprotected sex with confirmed HIV positive person. I have posted here regarding my exposure, how far true is it that HIV can hide for several year inside the body without detected by tests. I had several test like HIV DNA PCR test at 18 days after PEP which came negative, an Alere Determine HIV test at 40 days and lastly duo test at 49 days. Will all the test picked the virus even it hides in the blood?