A few days ago, some stranger handed me a cigarette, I didn't think that much so I smoked it immediately. It was very dark at that time, i didn't give a good look on that cigarette. Am i at risk of being infected of HIV from that cigarette, is there anyway that the virus could be put in the cigarette or he intentionally left his blood or body fluids on the cigarette that could cause the infection. I know this sounds totally paronoid, but i just cant get over the fear, is it possible that the virus could be still alive and infectous in the cigarette while i am smoking it or there is absolutely no possibility.hope someone could give me an answer!