Viral Invaders Fight Infections

Guest: Cedric Feschotte, PhD, Postdoctoral Fellow at the University of Utah; Ed Chuong, PhD, Professor of Human Genetics at the University of Utah  When your body’s immune system defeats an infection caused by a virus, certain types of viruses will leave a little genetic souvenir of themselves behind. It’s happened so often over time that today, about eight percent of human DNA was originally left behind by viruses that lost ancient immune system battles.