During a discussion about HIV transmission, which scenario indicates no risk of HIV exposure?

The scenario that indicates no risk of HIV exposure is when an individual makes a donation of a pint of whole blood. Blood donation processes are highly regulated and conducted under strict safety protocols. Donors are screened for various infectious diseases, including HIV, ensuring that collected blood is safe.

In contrast, the other scenarios present a risk for HIV exposure. Unprotected sexual intercourse allows for the transmission of the virus through bodily fluids. Sharing needles is particularly risky as it involves direct blood-to-blood contact, which can transmit HIV and other bloodborne pathogens. Engaging in oral sex, while generally considered lower risk compared to other forms of sexual activity, can still pose a risk if there are open sores or cuts in the mouth or if infected bodily fluids are involved. Thus, among the listed scenarios, blood donation stands out as a situation without risk for HIV exposure.