Public health refers to the science of protecting the safety and improvement of health communities through education, policy making, and disease and injury prevention research. Activities to strengthen the capacity and service of public health are aimed at providing conditions under which people can remain healthy, improve their health and well-being, or prevent their health from deteriorating. Healthcare Management is the oversight of healthcare systems, public health systems, hospitals, entire hospital networks or other medical facilities. Duties of these professionals include ensuring that individual departments run smoothly, qualified employees are hired, information is disseminated efficiently throughout the organization, specific outcomes are reached, and resources are used efficiently, among many other responsibilities.