Immaculata De Vivo is a professor of epidemiology at the Harvard T.H. Chan School of Public Health and the Harvard Medical School. Peter Kraft is a professor of epidemiology and biostatistics at the Harvard T.H. Chan School of Public Health. In this conversation with Professor Alyssa Goodman, they discuss a wide range of topics, including the ways in which new technologies might predict -- or fail to predict -- health outcomes for individual patients.