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Last code list update: 2017-04-20 | Code | Definition |
| 1 | Homo/bisexual |
| 2 | Injecting drug user |
| 3 | (1+2) |
| 4 | Haemophiliac |
| 5 | Transfusion, non-haemophilia related |
| 6 | Heterosexual contact |
| 7 | (6+2) |
| 8 | Perinatal |
| 9 | Sexual contact (homo/hetero not specified) |
| 10 | Sexual abuse |
| 90 | Other (specify) |
| 99 | Unknown |