Hep C spreads in pretty much the same ways as HIV - through unprotected sex, through blood transfusions, but also through needlestick injuries and through having infected body fluid enter cuts or other bodily openings.
I used to work in a care home where a couple of the residents were Hep C positive. If they ever vomited or cut or peed themselves etc, then we had to wear full protection (gloves, apron, mask etc) for the cleaning up job and use special cleaning granules as well. Similarly, if they spat in our faces or scratched us, we'd have to go to occ. health for a routine blood test.
All staff were expected to get vaccinated as well.