| Value | Category |
|---|---|
| 1 | Blood transfusion |
| 2 | Sex without condom |
| 3 | Use of un-sterilized sharps (injection pins, needles, knives |
| 4 | Mother to child (womb/breastfeeding) |
| 5 | Circumcision |
| 6 | Sex with many persons/partners |
| 11 | Mosquito bites |
| 96 | Other |
| 98 | Dont know |
| 99 | Missing |