How did research help us diagnose a disease and one specific example of how research has helped us prevent a disease?

Research has been pivotal in diagnosing diseases by identifying specific biomarkers and genetic markers associated with conditions. For example, the discovery of the BRCA1 and BRCA2 gene mutations through genetic research has significantly improved the early diagnosis of breast and ovarian cancer. In terms of prevention, vaccine research has led to the development of the HPV vaccine, which has been shown to significantly reduce the incidence of Cervical cancer by preventing infection with high-risk strains of the virus.