A new challenge for the Medical Community, moving beyond the emergency.Long Covid, or Post-Acute Sequelae of COVID-19 (PASC), is the medical definition of all those highly varied ailments and disorders, which persist in more or less severe form even many months after recovering from Covid-19. To date, Medicine is unable give decisive explanations for this phenomenon, which according to estimates affects from 2 to over 5 in 10 infected individuals, including asymptomatic ones.This book was created to give a message of hope, and to make a contribution to acquiring a new vision about the concept of health, not only considering Long Covid patients, but all those interested in taking an active role in their own well-being. "I hope that this book helps people to recover the full meaning of life. My main goal is that it should create a watershed between what the reader thought about Covid-19 before and after reading. In my long history of clinical practice, I have come to realize that in order to motivate people to pursue healthier lifestyles, they need a full understanding of how things stand. This approach also guided me in writing this book". Andrea Grieco, MD.