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The population in query will be as small as a handful of people or as massive as all of the inhabitants of several continents (as an example, in the case of a pandemic ). Public health has many sub-fields, but usually consists of the interdisciplinary classes of epidemiology , biostatistics and health providers Environmental health , community health , behavioral health , and occupational health are also vital areas of public health.
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The main target of public health interventions is to forestall and manage diseases, accidents and different health conditions via surveillance of circumstances and the promotion of healthy habits , communities , and (in facets relevant to human health) environments Its intention is to stop health issues from taking place or re-occurring by implementing academic packages , creating policies , administering services and conducting analysis 50 In many circumstances, treating a disease or controlling a pathogen will be vital to stopping it in others, equivalent to throughout an outbreak Vaccination programs and distribution of condoms to prevent the spread of communicable diseases are examples of common preventive public health measures, as are academic campaigns to advertise vaccination and using condoms (together with overcoming resistance to such).
26 It has been demonstrated that increased time spent in pure environments is related to improved self-reported health 27 , suggesting that the constructive health benefits of pure area in urban neighborhoods should be taken into account in public coverage and land use.