Bodily Fluids. Like other blood borne diseases, it can be spread during exchange of bodily fluids this commonly includes IV drug use, sexual encounters, improper tattoos, during birth of a child and previously with blood transfusions.
Blood. This is a blood born virus that is transmitted through the blood. Most commonly it is transmitted from an infected mother to her baby during development or between IV drug users who share needles.
Condoms. Don't share needles, toothbrushes or razors. Use condoms during sexual intercourse.
Blood to blood. Contact is required - so eliminating that. Globally, screening bloodbanks, needle exchange programs, monitoring tattoo parlors. In the household, not sharing razors and toothbrushes, and avoiding any/all other blood to blood contact.