Learn about genomics and precision health from CDC. Find out the definition of Genomics, and find resources on subjects such as genetic testing and newborn screening, family history for cancer, and prenatal testing. Genetics: the study of inheritance. Genomics: the study of people’s genes and how they interact with each other and with the environment. CDC Office of Public Health Genomics explains how Clinical genetic tests are different from direct-to-consumer (DTC) genetic tests. Precision Health includes precision medicine plus using personal mobile devices to support healthy living. See “Hot Topics of the Day” if you want to read the latest. Updated 2023.