Hi, and thank you for your question.
HIV is not commonly passed through oral sex. The person most at risk for STI’s in this encounter is the person whose throat is exposed. We always recommend routine testing for STIs including chlamydia, gonorrhea, syphilis and HIV for all sexually active individuals.
For more information about chances of getting an STI from oral sex, please visit https://smartsexresource.com/sites/default/files/Oral-Sex-Table-v3.png
Let us know if this does not answer your question or if you have any more questions or concerns.
Health Nurse