Proportion of HCV antibody (anti-HCV)–positive entrants to Pennsylvania state prisons (2004–2012) in each birth cohort, by sex, in (a) 2004–2012 (n = 101 727), (b) 2004–2006 (n = 17 604), (c) 2007–2009 (n = 40 178), and (d) 2010–2012 (n = 42 477).
Note. Shaded area denotes the 1945–1965 birth cohort recommended by the Centers for Disease Control and Prevention for 1-time anti-HCV testing.