Estimated per act risk for acquisition of HIV by exposure route
Exposure Route // Estimated infections per 10,000 exposures to an infected source
Blood Transfusion // 9,000
Childbirth // 2,500
Needle-sharing injection drug use // 67
Percutaneous needle stick // 30
Receptive anal intercourse* // 50
Insertive anal intercourse* // 6.5
Receptive penile-vaginal intercourse* // 10
Insertive penile-vaginal intercourse* // 5
Receptive oral intercourse* // 1
Insertive oral intercourse* // 0.5
*assuming no condom use

