Fundamentals of vaccine immunology

From a literature review of the current literature, this article provides an introduction to vaccine immunology including a primer on the components of the immune system, passive vs. active immunization, the mechanism(s) by which immunizations stimulate(s) immunity, and the types of vaccines available. Both the innate and adaptive immune subsystems are necessary to provide an effective immune response to an immunization. Further, effective immunizations must induce long-term stimulation of both the humoral and cell-mediated arms of the adaptive system by the production of effector cells and memory cells. At least seven different types of vaccines are currently in use or in development that produce this effective immunity and have contributed greatly to the prevention of infectious disease around the world.