Even though the teaching and learning of immunology has been somewhat a difficult objective, experts in the field believe it can be an interesting area of study if people are taught in a manner that will give them a maximum understanding. One way of doing this is presenting information in a digested form. This way, people with limited science background can easily learn and understand the subject. This book is bringing immunology to first timers in a more digested form. It is a report of a study that looked at the effect on terminal monocyte-macrophage differentiation of blocking the interaction of Complement C2 with its Receptor CRIT, using antagonistic peptide CRIT-ed1 and Histamine. It is believed this book will help to remove the fear of students for whom immunology has become a no go area but who must obtain a pass in it as part of their course of study.