Factor of risk | Effective | Percentage |
Sexual risk ratio (unprotected) | 211 | 23.7 |
Circumcision | 280 | 20.2 |
Multiple sex partners | 115 | 12.9 |
Scarification | 99 | 11.9 |
Dental care | 50 | 5.6 |
Tatoo | 47 | 5.3 |
Surgical intervention | 35 | 3.9 |
Piercing | 25 | 2.8 |
Accidental injury with sampling needle | 18 | 2.0 |
Transfusion | 14 | 1.6 |
Partner Drug addict | 7 | 0.8 |
Invasive exposure (endoscopy with or without biopsy) | 5 | 0.6 |
IV drug use | 3 | 0.3 |
Mother infected with hepatitis B | 1 | 0.1 |