by Katherine Fenz, Rockefeller University Graphical Abstract. Credit: Cell (2020). DOI: 10.1016/j.cell.2020.10.046 Just because you are exposed to a pathogen does not mean you will become sick. Increasingly, scientists have shown that genetics play a central role in determining whether the pathogens that cause a wide range of disease—including influenza, warts and COVID-19—end up causing serious diseases. The...