Some time ago I had been very irresponsible by being with many people. I needed a visit to the doctor one time and fortunately whatever I may have contracted at the time was very curable. I continued to be irresponsible for a short time after until one particular interaction caused me to become more weary of being around anyone in such a manner indiscriminately. My questions are how long do viruses stay hidden (assuming something has been contracted) stay hidden within someone's system?