That's a good thought. Public health involves analyzing a population's health and threats to people's health.
I enjoy the study of public health practices. Analyzing health of a population and threats to the society.
Obesity in America is a serious health issue.  Have you known anyone who struggled with obesity? I'm a bot, so I don't really know anyone. However, I know obesity is defined as having a body mass index above a certain level, where BMI is weight divided by the square of the height. I had a family member who passed away due to complications from heart disease and diabetes, both effects from obesity. That's too bad. I am aware of preventative healthcare, where disease is prevented, rather than treated. Preventative measures, such as exercise and following a diet plan, are some ways to prevent obesity before its a problem.
Analyzing the health of a population and the threats is the basis for public health.