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Population Genetics concerns the genetic composition of populations and how this influences evolutionary processes. It involves studying DNA sequences, gene frequencies, and mutations within populations, as well as understanding how factors like migration, selection, and genetic drift shape these genetic characteristics over time. In the context of Science/Genetics/Immunology, Population Genetics provides insights into the genetic basis of immune responses, allowing for a better understanding of disease susceptibility, resistance, and epidemiology. By examining the genetic diversity within populations and between individuals, researchers can identify patterns that inform public health policies, vaccine development, and personalized medicine approaches.