1. Biostatistics
2. Epidemics science
3. behavioral sciences
4. Health Services Administration

Public health is defined as the science of preventing disease and promoting health through the organized efforts of a community. Public health focuses on the full range of health and well-being, not just the elimination of specific diseases. Public health services include the provision of personal services to individuals, such as health advice, behavioral counseling, and vaccinations There are many scientific fields concerned with the specialization of health, which are

Biostatistics can be defined as the science that applies statistical theory and principles of mathematics to research in medicine, biology, environmental sciences, public health and related fields.

It is considered a science that monitors all diseases that spread throughout the world, whereby the epidemiologist is asked to investigate the causes of the spread of the disease and how to control its spread. Where epidemiologists work in all stages of the outbreak and spread of the disease with public health practitioners, in order to identify the causes of its spread and how to stop it.

Doing study and work in that field helps in improving public health, and this is by encouraging healthy lifestyles, through changing behavior and the educational awareness process.

  This field of health services management that is between politics, business and science also in the management of these human and financial materials that are needed. In order to provide all effective public health services, work in the health services department must include managing the data base that is in a school clinic, working on analyzing better health policies, or developing budgets for a health department.