This volume is dedicated to multidisciplinary research at the interface between basic biomedicine and clinical practice.  This book guides best practice in the diagnosis and therapy while dealing with difficult-to-treat disorders of yet unclear etiology. Chapters address such disorders as granulomatosis with polyangiitis causing autoimmune-related multiorgan inflammation of blood vessels, increasingly widespread allergy to peanuts, occupational exposure to zinc oxide, and immunogenic responses to pneumococcal and influenza vaccination underlying their preventive effectiveness. Other hot issues deal with the proper use of fluid therapy in the perioperative period and a cognitive decline in lung transplant patients. A new physiotherapeutic approach of treating key myofascial trigger points in low-back pain appears highly beneficial in reducing patients' disability, advancing physiotherapy of this overwhelming condition. Finally, other chapters consider ways to streamlinemedical management to increase the number of physicians and their availability for patients, a particularly sensitive issue in the current COVID-19 pandemic. The dissemination of clinical knowledge about high-risk and hardly controllable conditions is an inalienable part of progress in medical practice.  The book is a resource for clinical specialists, general practitioners, and allied healthcare professionals.