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Seroprevalence according to age group. Data in absolute numbers for age groups 15–30, 30–45, 45–60, >60 years, respectively: HIV-1/2 (1/132, 2/211, 2/232, 1/104); HBV (1/127, 3/203, 5/224, 0/103); HCV (0/129, 1/205, 7/226, 2/103); Treponema cruzi (1/126, 3/201, 11/219, 7/100); T. pallidum (3/127, 18/203, 31/220, 25/99) (* P = 0·02, ** P < 0·01).
