The Tsinghua Changgung Clinical Case Collection – Emergency Cases, Severe Cases and Infectious Diseases is divided into four parts: emergencies, severe cases, intractable cases and infections. It includes various typical emergencies, critical and severe cases, such as fatal chest pain, thermoplegia, poisoning, and multiple injuries. Meanwhile, it also contains some rare and intractable cases, such as Elevated serum immunoglobulin E syndrome and spontaneous coronary artery dissection. Infection-related cases are either diagnosed in a convoluted way or are hard to treat, and the process is intriguing. This book presents the most realistic thought process of the clinical scenario, with a focus on the right clinical decisions.