In addition to differentiation by species, zoology also encompasses other types of research, such as animal physiology, behavioral ecology, evolutionary biology and ethology, the study of animal behavior.
Public health is personal. Public health professionals focus on preventing disease and injury by promoting healthy lifestyles. They implement educational programs, develop policies, administer services, conduct research, and regulate health systems to achieve these goals.
They make public health messages and actions meaningful to those who often are not reached by mainstream and commercial messages. The work involves action in a wide range of health issues, such as alcohol, social environments, tobacco control and oral health. Public health community health workers might: