The 2009 H1N1 pandemic tested the limits of the public health emergency preparedness systems in the US and abroad. The successes and failures from this pandemic remain relevant, particularly as pathogens like MER-CoV and Ebola continue to proliferate. As the world's population continues to travel farther and with more frequency than ever before, the lessons of 2009 stand as important touchstones for future public health infrastructures and interventions. draws lessons from the public health system's response to the influenza pandemic, offering a collection of chapters that are highly relevant to all public health emergencies. Not simply a historical case study, this analysis employs a systems perspective that encompasses both government health agencies and community-based entities such as care providers, schools, and media. The chapters demonstrate rigorous qualitative research approaches that can be used to analyze public health system responses to both pathogens and a wide variety of other public health emergencies. With contributions from a broad panel of experts, the book will be useful for anyone seeking to learn from pH1N1 and to see public health systems in current, specific contexts. draws important insights from this global event and will help improve public health emergency preparedness systems for future pandemics.