blood to blood.. sharing needles, sharing straws for snorting drugs, and needle sticks by health providers are incidents that need to be checked. the issues you are talking about are extremely low risk..
I had hep c for 45 years..I have been here for a decade.. talking to thousands of hep c patients.. we were told by drs about not sharing toothbrushes, shaving utensils. etc
we were told that unprotected monogamous sex was OK.
we were told to handle blood with gloves and sanitizing cleaners.
There are hundreds of websites that will all tell you the same safeguards. some may differ on a small issue.. But I will always follow my drs advice..
getting tested, if you are worried, is always an option..