Public health encompasses the study of factors that influence people’s health and promote preventative care. Its research focuses on how to keep residents safe and healthy. The public health sector is comprised of many different roles, and includes doctors, nurses, researchers, lab technicians, social workers, administrators. Public relations and marketing professionals also work in public health to educate the public on new health care research and healthy lifestyle choices. The primary goal of all public health employees is to find the best ways to promote information that protects the wellbeing of the community-at-large.