Public health has many sub-fields, but sometimes includes the interdisciplinary categories of epidemiology, biostatistics and health companies. Environmental health, neighborhood health, behavioral health, and occupational health are additionally necessary areas of public health. In kids, sleep is also very important for progress and growth. Ongoing sleep deprivation has been linked to an elevated danger for some persistent health problems. In addition, sleep deprivation has been shown to correlate with both increased susceptibility to sickness and slower restoration times from illness.

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