Public health is often traditionally described as epidemiological health. However, public mental health is increasingly seen as a humanistic issue. This is why many Medical Faculties now have huge Humanities departments, and why the most advanced psychology journals dealing with public mental health, among other issues, specifically focus on the philosophical, ethical and life style aspects of public health. Thus, journals such as Philosophical Psychology, Philosophy, Psychiatry and Psychology and others discuss issues of public health at the interface of medicine, psychology, philosophy and culture.
Today, studying public health as a merely epidemiological theme is outdated, and the most advanced research in public health suggests that the way we understand, for example, our social responsibility, directly determines our physical and mental health.
For a key paper at the cutting edge of this type of research, consider John Turri’s ‘Pathways from inability to moral blamelessness’, in Philosophical Psychology: https://www.tandfonline.com/doi/abs/10.1080/09515089.2021.2016673.