Type of exposure with known HIV-positive source who is NOT on antiretroviral treatment |
Estimated risk of HIV transmission/exposure* |
Receptive anal intercourse (RAI)
- ejaculation
- withdrawal |
1/70
1/155 |
Shared needles and other injecting equipment |
1/125 |
Insertive anal intercourse (IAI) uncircumcised |
1/160 |
Receptive anal intercourse (IAI) circumcised
|
1/900 |
Receptive vaginal intercourse (RVI) |
1/1250 |
Insertive vaginal intercourse (IVI) |
1/2500 |
Receptive or insertive oral intercourse |
Unable to estimate risk - extremely low |
Needlestick injury (NSI) or other sharps exposure |
1/440 |
Mucous membrane and non-intact skin exposure** |
<1/1000 |