Joana Azeredo is an Associate Professor at the University of Minho Department of Biological Engineering (Portugal). In this podcast episode, Joana explains how and why she researches a special kind of virus that can kill potentially dangerous bacteria. These viruses are of great therapeutic interest and can be used to control infectious diseases. Joana Azeredo's team recently also stood out by creating a “virus bank” to treat diseases caused by antibiotic-resistant bacteria, one of the biggest health problems worldwide.