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.
A large part of public health is promoting healthcare equity, quality and accessibility. The CDC is the nation's disease prevention and wellness promotion agency, protecting people's health and safety, providing credible information to enhance health decisions, and improving health through strong partnerships.