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call 020 7637 1600 60 Harley Street, London, W1G 7HA


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HIV Transmissions & Risks

Guide To Sexual HealthClick the image above to download a free copy of our sexual health brochure

Call 020 7637 1600 for 100% Confidential HIV testing

We receive very many enquiries every day on the subject of HIV risk and whether a particular activity, sexual or otherwise, might lead to infection with HIV.

Most of these enquiries are questions about very low risk to zero risk activities, some not involving any sexual activity at all.

One of the commonest questions is about the risks associated with having oral sex. It seems from current knowledge and reporting that oral sex represents a very small to zero risk of HIV transmission. Please remember that we are talking ONLY about HIV here and not Chlamydia, gonorrhoea, herpes, syphilis etc which are much more easily transmissible.

Oral sex represents a negligible to very low risk of transmission because of a number of different complimentary factors. These include the fact that cells lining the mouth and throat tend to be resistant to HIV infection; that saliva contains HIV inhibitory enzymes; and that the chemical composition of saliva interferes with the chemistry inside cells which do become infected.

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60 Harley Street,




020 7637 1600

Opening Hours

Monday 8:30am - 6:30pm
Tuesday 8:30am - 6:30pm
Wednesday 8:30am - 6:30pm
Thursday 8:30am - 6:30pm
Friday 8:30am - 5:30pm