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By (user no longer on site)
over a year ago
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Hope this helps.
Risk-per-exposure
Vaginal sex, female-to-male, studies in high-income countries - 0.04% (1:2380)
Vaginal sex, male-to-female, studies in high-income countries - 0.08% (1:1234)
Vaginal sex, female-to-male, studies in low-income countries - 0.38% (1:263)
Vaginal sex, male-to-female, studies in low-income countries - 0.30% (1:333)
Vaginal sex, source partner is asymptomatic - 0.07% (1:1428)
Vaginal sex, source partner has late-stage disease - 0.55% (1:180)
Receptive anal sex amongst gay men, partner unknown status - 0.27% (1:370)
Receptive anal sex amongst gay men, partner HIV positive - 0.82% (1:123)
Receptive anal sex with condom, gay men, partner unknown status - 0.18% (1:555)
Insertive anal sex, gay men, partner unknown status - 0.06% (1:1666)
Insertive anal sex with condom, gay men, partner unknown status - 0.04% (1:2500)
Receptive fellatio - Estimates range from 0.00% to 0.04% (1:2500)
Mother-to-child, mother takes at least two weeks antiretroviral therapy - 0.8% (1:125)
Mother-to-child, mother takes combination therapy, viral load below 50 - 0.1% (1:1000)
Injecting drug use - Estimates range from 0.63% (1:158) to 2.4% (1:41)
Needlestick injury, no other risk factors- 0.13% (1:769)
Blood transfusion with contaminated blood - 92.5% (9:10)
Sources: vaginal sex;1 anal sex;2 fellatio;3 2 mother-to-child;4 other activities.
References
1 Boily MC et al. Heterosexual risk of HIV-1 infection per sexual act: systematic review and meta-analysis of observational studies. Lancet Infect Dis 9(2): 118-129, 2009
2 Vittinghoff E et al. Per-contact risk of human immunodeficiency virus transmission between male sexual partners. American Journal of Epidemiology 150: 306-311, 1999
3 Del Romero J et al. Evaluating the risk of HIV transmission through unprotected orogenital sex. AIDS 16(9): 1296-1297, 2002
4 Townsend C et al. Low rates of mother-to-child transmission of HIV following effective pregnancy interventions in the United Kingdom and Ireland, 2000-2006. AIDS 22: 973-981, 2008
5 Baggaley RF et al. Risk of HIV-1 transmission for parenteral exposure and blood transfusion. AIDS 20: 805-812, 2006 |