jus askin can hiv be transferred if there is blood in razorr from previous visitor who is hiv + just askin ..
hiv can't live that long outside the body. no risk. and i'm pretty sure the barber changed blades. he can get in a lot of trouble if he doesn't with the health inspector.
HIV is a fragile disease which cannot be transmitted outside of it's host. Unprotected anal/vaginal intercourse, sharing needles, mother to child. You're good to go.