What is the risk of contracting HIV or HCV through oral sex?

Oral sex can lead to HIV infection, but the risk is small, or at least much lower than vaginal or sex. In one of the sources I found information that it may be at the level of 0.04%, although most materials simply describe it as "very low", noting that it can increase if the sick person had, for example, bleeding wounds in the mouth. Similarly, the risk of HCV (hepatitis C) infection during sex is small, but it exists. The low level of risk is due to the fact that the virus is present in saliva, sperm and vaginal secretions, but in small amounts. The main source of infection is blood. In contrast, oral intercourse without a condom is not free from the risk of infection with pathogens such as syphilis, gonorrhea and others. In some laboratories, there are packages testing health for diseases that may be related to sexual activity (not only oral), which include the diagnosis of diseases such as: syphilis, HIV, herpes, hepatitis B and C, chlamydia, gonorrhea, mycoplasma, ureaplasma, trichomonas. The time after which individual diseases can be detected may vary depending on the laboratory method - I would refer for more information directly to the laboratory. I enclose materials that may be of interest to you: https://www.gdziepolek.pl/kategorie/testy-na-choroby-weneryczne https://www.gdziepolek.pl/artykuly/co-warto-wiedziec-o-hiv-i-aids https://www.gdziepolek.pl/artykuly/jak-nie-zarazic-sie-choroba-weneryczna