Fig. 3

The pooled prevalence of HBV among PWID in different provinces. 1: Alborz, One study, N = 132; 2: Kerman, One study, N = 31; 3: Tehran, 6 studies, N = 2085; 4: South Khorasan, 2 studies, N = 68; 5: Markazi, 2 studies, N = 253; 6: Charmahal and Bakhtiari, 2 studies, N = 162; 7: Khuzestan, One study, N = 131; 8: Hormozgan, One study, N = 249; 9: Ghom, One study, N = 644; 10: Khorasan Razavi, 2 studies, N = 212; 11: Kohkiloyeh & Boyerahmad, One study, N = 158; 12: Kermanshah, 2 studies, N = 616; 13: Isfahan, 6 studies, N = 3020