I took a Taxi yesterday, I suddenly felt a tingling in my scrotum position when I got off. I went home and found skin broken on the scrotum, but there was no bleeding. I checked my seat when I got off, but I didn't find a needle. Later, I called Taxi customer service and asked about 25 minutes from the last passenger getting off the bus. No abnormal behavior was found during the transfer monitoring, However, I still feel suspected that someone maliciously installed AIDS needles. If it is a needle, does the blood dry in 25 minutes and is not infectious,if only skin broken no bleeding, can infect AIDS virus?Is there any risk of me?Thank you very much!