 [ Symptoms ] how soon can the blood test detect if you have genital herpes if you get the blood test after you have had unprotected sex with someone who has herpes and it comes back negative is there still a chance you can have the herpes virus [ Disease ] i have a secondary question that goes along with yours hope you do not mind me piggy backing on your question if someone has unprotected sex with someone that has herpes and that person breaks out during the unprotected sex and then that person who did not have it gets a blood test for herpes just 7 days later and that comes back negative for that person is that conclusive or does it take longer to show up in the blood test