Incidence =  # of individuals who fall ill with a certain disease during a defined period / the total population (if the time period is not stated it is assumed to be 1 year)

Prevalence = # of all current (new and old) cases during a certain period of time / total population (excludes recovered and dead).

Case Fatality Rate = # of deaths caused by a specific disease / number of diagnosed cases of that disease

Mortality = deaths from a specific disease in a given year / total population

Natality = births in a given year  / total population

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