Final answer:
HIV/AIDS is the health condition classified as a World Health Organization priority and a focus of health promotion for nurses.
Step-by-step explanation:
The health condition classified as a World Health Organization priority and a focus of health promotion for nurses is HIV/AIDS. HIV/AIDS is a global health issue that affects millions of people worldwide and requires comprehensive care and support. Nurses play a crucial role in providing education, prevention strategies, and care for individuals living with HIV/AIDS.