Studies have already shown that the MMR vaccine does not cause autism. In other words, what risk does one have of acquiring HIV by practicing receptive oral sex with or without ejaculation? So I think, again, it comes down to the kind of population that you're talking about and I think the data we have on that has weaknesses. Oral hygiene and health, gingivitis--certainly a large majority of case reports have speculated that gingivitis may play a role in increasing the risk of acquiring HIV orally. We have one report in the Options Project, one oral transmission case in which it's unclear whether there was ejaculation.
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HIV: Sexual Transmission, Risk Factors, & Prevention
This is why unprotected oral sex is risky. What factors might inhibit it? So I don't think you can count up the number of case reports and say that the number of cases reflects what's happening with the epidemic. So we will say that fellatio without ejaculation can happen but it is exceedingly rare. Also, there are often research gaps, he says, meaning that in many cases, scientists might not yet have real-world examples to back up these numbers and calculations, but they do have mathematical modeling and the biological rationale for why certain ideas about HIV risk are true.
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The next thing we did was look at those remaining cases and look at how good the evidence was and one of the problems here, like other people pointed out, is there really are not that many men who have sex with men who are only having oral sex. There are bigger fish to fry; there are more things to worry about. Using protection consistently and correctly for both oral sex and intercourse will help keep your sex life healthy and worry-free. In some sense, we're talking about the ways that misclassification can happen, either over- or under-attributing HIV acquisition to receptive oral sex. Are there any documented cases of AIDS being spread this way? Once semen makes its way past the mouth, stomach acid and enzymes in the esophagus kill any HIV in it, so swallowing is actually one of the safest things to do after a blow job. And the CDC says condoms lower risk about 80 percent.
If the insertive partner has an STD that's either ulcerative potentially or certainly inflammatory, you're going to have more HIV in the ejaculate. HIV is not passed on easily from one person to another. Theoretically, anything and everything is possible. I also wanted to go over some of the data that we're starting from in estimating risk of oral sex transmission. This is the study that we published in , where we showed an elevated odds in a model controlling for anal sex, and actually this is what led me to begin to believe that there was increased oral sex risk, finding this elevated odds ratio in association with oral sex in seroconverters Slide 6. Nowadays, oral sex is as common as a handshake.