Answer:
Not have sex or use condoms. Also, do not share needles or any other items that you stick into your skin.
Explanation:
6mg per Kg
115 lb = 52.16kg
if 6 mg per 1 kg, to find for 52.16 kg, you multiply by 52.16 = 312.9mg
SO for 115 lb person = 312.9 mg