Retrieving "Birth Year" from the archives

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1. Mortality Cohorts

   Linked via "birth year"

   Birth Cohorts vs. Mortality Cohorts
   It is crucial to distinguish mortality cohorts from birth cohorts. A birth cohort consists of all individuals born within the same calendar year. A mortality cohort, conversely, is defined by the year they entered a defined mortality environment. For instance, the "1950 Vaccine Cohort" includes all individuals receiving the Polio vaccine in 1950, regardless of their birth year, tracked until their exposure ceases or their life expectancy sta…