Anon1234
Hello,
i would appreciate a response as im very worried. I was seeing a guy and we had a deep passionate make-out session that got pretty heated about 4 months ago. We were well into it and then we realized he had gotten a nosebleed and blood was all over my face (nose and mouth area) and inside my mouth. i have a septum piercing that is 2 years old so i dont know if that is a risk of getting HIV from this encounter with the blood exposure. But i did ask him if he had anything i should be concerned over like HIV, Hepatitis B&C and he said no, but if he did have HIV and was too scared to tell me, what chance of me contracting it from this incident? 
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helpline-volunteer
Hi there,

Thank you for your inquiry. From what we gather from the question, you were asking about the possibility of HIV transmission through deep kissing (making out) with an individual who had a nosebleed. From the information given, this scenario is determined to be Negligible Risk (there is no evidence or no documented cases of transmission, however, there is a theoretical possibility of transmission under certain extenuating circumstances).

According to the HIV Transmission Equation (see below), HIV transmission requires a bodily fluid (e.g. blood) that has direct access to the bloodstream (e.g. via open cuts and sores, sexual organs, mucosal membranes, etc.) through an High/Low/Negligible activity. 

Assuming that you had no bleeding gums, canker sores, or other open wounds in your mouth that would facilitate access to your bloodstream, there would No Risk of transmission in this scenario.

Furthermore, HIV does not spread through saliva (1). Saliva can "inhibit HIV replication in infected cells and can rapidly kill HIV-infected leukocytes" (2). This is because saliva has "components that can aggregate HIV" and also contains proteins which can protect against HIV and render HIV particles ineffective (e.g. peroxidases). Therefore, even if you had swallowed blood containing HIV particles, it is extremely unlikely for HIV transmission to occur in this situation.

However, if you had one of the aforementioned cases mentioned in the third paragraph, this would increase your risk of HIV transmission, due to the fact that there would be a possibility of HIV positive fluid having direct access to your bloodstream.

Recommendation: There are no evidence or no documented cases of transmission. Refer to a healthcare professional for more personalized answers.

Best regards,
AIDS Vancouver Online/Helpline, Shirley

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Helpline Transmission Equation  (1).jpg
Additional Resources:
(1) HIV Transmission Basics
(2) The Oral Mucosa Immune Environment and Oral Transmission of HIV/SIV
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