This book consists of a collection of reviews and original researches that depicts the purpose and importance of this field for the study of specific diseases and evaluations. It presents inputs given by authors from various countries discussing the broad application and importance of clinical flow technology in medicine. Some of the topics discussed are autoimmune disease, cancer and the evaluation of new drugs. The book intends to give beginners a helpful introduction, but it also caters to the experienced flow cytometrists with new insights and a better knowledge of clinical cytometry.