If you have come in to contact with someone who has hepatitus A, what are the chances you could catch it? You see, i went out to a nightclub and had a draw of a cigarette from a guy i barely knew. I know it sounds pathetic but my father caught Hepatitus A from a similar way years ago and now im a little worried. I mean, i dont even know if the guy was sick or not and it was one draw. Please help.