I am a 53 year old marriedd woman and went to donate blood only to be deferred because I tested positive for Syphilis. There were some other results, I did not understand like EIA positive, RPR negative and FTA positive. If my memory serves me well, I tested positive for syphilis or some STD forty years ago, was treated. Would these diseases still show in your blood 40 years later? How common are flase positives?