This book provides healthcare professionals in Critical Care setting an easy consultation guide to fight against COVID-19. The book is divided into sections: Fundamentals of COVID-19, Pneumological critical care, Neurological manifestations, Cardiovascular manifestations, Renal manifestations, Haemostasis and coagulation, Other multi-organs involvement, Principles of therapy. Each section includes: * brief pathophysiology of COVID-19 (ventilation, neurological, cardiovascular, etc.); * principles of management (enriched with flowcharts and figures); * principles of therapy; * tips and key messages. Readers can find the most updated advices on how to face the ongoing pandemic: from principles of conventional oxygen therapy, assisted and invasive mechanical ventilation in critically ill COVID-19 patients to the complications sometimes underestimated. Tables and flowcharts provided are based on current knowledge in COVID-19 to help the clinician managing COVID-19 patients by a multiple-organs prospective. Written by international key opinion leaders of each field, the book represents a point of reference for all professionals involved in the management of COVID-19 pandemic.