Dr. EWH / HHH,
I went to an event where you'd have to get a stamp on the wrist to get in. Not everyone could get a stamp and I didn't but someone I know did. So to transfer one on my wrist he slowly exhaled onto his stamp to make it moist and then put his wrist onto mine, strongly pressing on it, hoping that the stamp will leave a mark on my wrist as well. He held it very strongly, pressing on it, for about 20-30 second. Later, I realized that earlier that evening I got a small nail scratch on that wrist. So I thought what if he had something on his hand or he was scratched as well? I saw him do the same thing to someone else right before me and that person didn't give me a good vibe. So I thought what if he or that other person had some little blood and what if it was left on his wrist as well, what if he was hiv positive etc. If those were the cases would that be a risk? From what I understand I think there is no risk at all but I'm worried about it so I just wanted to confirm with you.
The scratch was small and I don't think it was bleeding but nonetheless the skin had an abrasion.
Thank you very much.