Final answer:
The World Health Organization (WHO) is not a bilateral aid agency, it is a UN specialized agency for international public health.
Step-by-step explanation:
The World Health Organization (WHO) is not an example of a bilateral aid agency; rather, it is a specialized agency of the United Nations responsible for international public health. Bilateral aid agencies are specific to one country and provide aid to other nations, typically as part of their foreign policy. In contrast, WHO works globally and is not tied to any single country's aid program. Thus, among the options given (WHO, USAID, PEPFAR, OZAID), the correct answer is WHO.