What is the primary focus of public health?

The primary focus of public health is indeed the prevention of disease and prolongation of life. This field is dedicated to improving the health of populations through organized efforts and informed choices. Public health aims to avoid health issues before they occur by implementing strategies such as health education, vaccination programs, and disease monitoring. The goal is to create a healthier society by addressing the root causes of health problems, promoting healthy behaviors, and ensuring access to necessary resources and care.

While individual wellness is important, public health takes a broader perspective, emphasizing collective health rather than just individual health. Similarly, the management of healthcare facilities is more aligned with healthcare administration rather than the core principles of public health, which focus on population health. Finally, diagnosis and treatment of illnesses are primarily the domain of clinical medicine, which deals with individual patients rather than populations as a whole. Thus, the emphasis on prevention and the overall improvement of community health makes the chosen answer the most accurate representation of public health's mission.