Hey guys. 2 years ago I went to a concert. Anyway in the mosh pit this guy slipped and cut his head. Anyways I after a minute or so he came to. He shook my hand and got blood on it. Freakin out I went to the bathroom to wash it off. The venue didnt have soap so I used water. I don't recall being cut at all. Are my chances/risk zero (0%)?