Hello doctor....actually me fear is that last week i was travelling in a train and a boy was selling some eatable items in train in plastic begs with lots of staples pins on these bags. I purchase some begs of these eatable items. After and hour i noticed my finger. I think there was some blood (not sure as it was looking like blood type)in my finger. I checked my finger several times but i did't feel any pain like pin prick. What if pins hits my finger just after it hits that selling boy. What are odds if that boy was hiv positive. I search same types questions on Med help. In mostly question it is told that there is no risk like this situation. Please help me if there is my own blood in my finger by same staple pin. Thanks.