A pin prick attack is an assault on another person with a needle or syringe tainted with the blood of somebody carrying a blood-borne disease, such as HIV. Although there have been numerous cases of people being attacked with needles and syringes, the idea that people infected with AIDS have deliberately attempted to infect others in this manner is generally considered an urban legend: Real cases of infection of HIV in this manner were typically taken from infected victims rather than from infected attackers.