The 2009 H1N1 pandemic tested the limits of the public health emergency preparedness systems in the United States and abroad. With pathogens such as Ebola continuing to pose a threat, The Public Health Response to 2009 H1N1: A Systems Perspective draws lessons from the 2009 influenza response to offer insights on improving preparedness for future pandemics. Michael Stoto ’75 is a professor at Georgetown University.