I cut my finger on a staple on a matchbox that recently a man on the street also used. i'm worried that the man also cut his finger on the matchbox,hi?

"Needle Stick": I would treat this as we do "needle sticks" in the health care industry. For example when a needle used on a patient accidentally comes into contact with a health care worker. Viral infections such as Hepatitis and HIV can be transmitted in this route. Immediate cleaning of the wound with soap/water and alcohol is recommended. Ideally you could test the other person and know your risk.