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 Knowledge Base Index :   HIV Risks

Odds of HIV infection

What are the odds of transmission if an HIV-negative person has sex or shares needles with an HIV-positive person?

The odds of transmission varies by infection route and by many factors present at the time of exposure, including genetics, presence of STIs, and where the HIV-positive person is in course of their infection (a higher viral load is thought to increase odds of transmission).

IAVI has attempted to quantify the risk of infection by sex act, but because of the numerous factors that affect transmission, they came up with wide estimates. See the link below for risk estimates:

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Date Created June 06, 2006
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