| Type of exposure | Estimated risk per episode* (95% confidence interval) |
|---|---|
| Occupational | |
| Percutaneous (e.g., needlestick) | 0.3% (0.2 to 0.5) |
| Splash contact to mucous membranes | 0.09% (0.006 to 0.5) |
| Nonoccupational | |
| Receptive anal intercourse | 1 to 30% |
| Insertive anal or receptive vaginal intercourse | 0.1 to 10.0% |
| Insertive vaginal intercourse | 0.1 to 1.0% |
| Injection drug use with needle sharing | 0.67% per needle-sharing contact |