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How do birth certificates, death certificates, and census records support epidemiological research?

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Know the investigations of researchers using genomic information to reconstruct the cause and transmission routes of the bubonic plague and the Black Death — epidemiology Researchers using genomic information to trace the transmission routes in past epidemics of plague.

In epidemiology, birth certificates, death certificates, and census records serve as essential secondary data sources used to calculate rates and conduct population-level research.1

Vital Statistics: Birth and death certificates provide the foundational data for calculating vital rates, such as crude birth and death rates, as well as infant mortality rates. These statistics allow researchers to track time trends, compare health conditions across different regions, and monitor fertility and mortality patterns within a population.123
Census Records: A population census provides a comprehensive enumeration of people at a specific time. Epidemiologists use this data to establish the population base necessary for calculating rates. In years between censuses, these records are combined with vital statistics—adding births and subtracting deaths—to estimate population changes and composition.41

Together, these records provide the statistical framework required to plan, organize, and evaluate public health services and medical care schemes, enabling researchers to study both infectious and noninfectious diseases effectively.5