Hepatitis C, liver, serious health complications, 3 million Americans, 1.2 million new cases, risk factors, contaminated blood/body fluids, needles/drug equipment, unprotected sex, tattoos/piercings 1945-1965 time period, multiple sex partners, blood transfusion before 1992 intranasal drugs (cocaine), long-term dialysis treatment HIV/AIDS cirrhosis hepatitis B avoiding behaviors testing treatment,