African Americans have the highest prevalence of diagnosed (2.5%) and undiagnosed (1.2%) hepatitis C among racial/ethnic groups. It is estimated that there are more than 1.4 million undiagnosed carriers of hepatitis C. More than ninety-five percent of all diagnosed cases of hepatitis C are in the 40-64 age group. The CDC recommends that everyone in the age 40-64 cohort be screened for hepatitis C.