A physician's role in public health is to improve the health of the population. This is done through preventive care, health promotion, and disease control. Physicians can also provide education on health topics and help identify health risks in the community. They can also provide clinical care to individuals and families in order to prevent and treat illness. Physicians also have a role in advocating for public health policies and collaborating with other health professionals to ensure the best care possible. Ultimately, physicians serve as the link between individual health and the health of the population.