Estimated risk of HIV transmission by type of exposure to an HIV-positive source6
| Type of exposure* | Estimated risk of HIV transmission per 10 000 exposures |
|---|---|
| Blood transfusion | 9000 |
| Intravenous drug use with shared needle | 67 |
| Receptive anal intercourse | 50 |
| Percutaneous needle stick | 30 |
| Receptive penile–vaginal intercourse | 10 |
| Insertive anal intercourse | 6.5 |
| Insertive penile–vaginal intercourse | 5 |
| Receptive oral intercourse† | 1 |
| Insertive oral intercourse† | 0.5 |