| Study | Number of personnel | HBsAg+ | Anti-HCV+ |
| Uganda 2003 [10] | 311 | 8.9% | ND |
| Syria 2001 [11] | 189 | 6% | 3% |
| Singapore 1988 [12] | 693 | 4.5%. | ND |
| Egypt 1989 [5] | 765 | 3.2% | ND |
| Nigeria 2005 [6] | 325 | 3.2% | ND |
| Turquie 2004 [8] | 595 | 2.7% | 5.4% |
| Japan 1997 [9] | 1638 | 1.1% | 2.8% |
| Mexico 2006 [7] | 376 | 00% | 0.8% |
| South Africa 2002 [19] | 402 | ND | 1.8% |
| Tunisia 2005 [16] | 885 | ND | 1% |
| Germany 1991 [17] | 1018 | ND | 1.2% |
| Australia 1990 [20] | 294 | ND | 2% |
| Italy 2004 [22] | 511 | ND | 3.8% |
| Hungary 2001 [15] | 477 | ND | 2.7% |
| Spain 1993 [21] | 784 | ND | 2% |
| America 1993 [18] | 1677 | ND | 1.4% |