The inhabitants in query can be as small as a handful of individuals or as large as all the inhabitants of a number of continents . Public health has many sub-fields, however typically consists of the interdisciplinary categories of epidemiology, biostatistics and health services. Environmental health, community health, behavioral health, and occupational health are additionally necessary areas of public health. Health, in accordance with the World Health Organization, is “a state of complete bodily, mental and social well-being and never merely the absence of disease and infirmity”.
According to GlobalIssues.org, approximately 36 million people die every year from non-communicable (i.e., …

