One problem is the access of people and communities to health care when it comes to financial, geographical or socio-cultural constraints. Applications of the public health system embody the areas of maternal and baby health, health companies administration, emergency response, and prevention and management of infectious and persistent diseases. The inhabitants in question could be as small as a handful of individuals or as giant as all the inhabitants of several continents . Public health has many sub-fields, however sometimes includes the interdisciplinary categories of epidemiology, biostatistics and health providers. Environmental health, community health, behavioral health, and occupational health are additionally essential areas of public health. Clinical practitioners focus primarily on the health of individuals, whereas public health practitioners contemplate the general health of communities and populations.
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