Genetic traits can significantly influence an individual's risk of developing certain diseases. For instance, mutations in the BRCA1 and BRCA2 genes are linked to a higher risk of breast and ovarian cancers. Similarly, genetic predispositions can impact the severity and progression of infectious diseases, such as how certain genetic markers affect the body's response to HIV or malaria. Understanding these genetic influences enables epidemiologists to better predict disease patterns and develop targeted interventions.
