The only risks for HIV in adults are:
1) Having unprotected anal or vaginal sex, or
2) sharing intravenous needles with IV drug users.
NOTHING else you can think of would put you at risk for HIV. You cannot get HIV from touching blood or fluids, and then touching ANY of your body parts, including your nose. If you do not engage in one of the two risks I mentioned above, you will NEVER have to worry about HIV.