Over the years, cancer epidemiologists have made significant contributions, such as: * Linking Smoking to Lung Cancer: Epidemiological studies were instrumental in establishing the causal relationship between smoking and lung cancer. * HPV and Cervical Cancer: Research identified the human papillomavirus (HPV) as a major cause of cervical cancer, leading to the development of the HPV vaccine. * Diet and Cancer: Studies have shown how diet and nutrition impact cancer risk, guiding public health recommendations. * Genetic Research: Identifying genetic mutations like BRCA1 and BRCA2 that increase the risk of breast and ovarian cancers.