Hepatitis C is transmitted when an infected person's blood enters a healthy person's bloodstream, for example, via contaminated needles (including unsterilized tattoo needles),
accidental needlesticks in healthcare workers, and less often, unprotected sex.
Seek immediate medical attention if you are HIV - negative (or don't know your HIV status) and are exposed to HIV, whether it's through unprotected sex or a condom break; needle or equipment sharing for injecting drugs; sexual assault; or, in health care settings,
an accidental needlestick injury.