immunisation

thumb|Dr. Schreiber of San Augustine giving a typhoid inoculation at a rural school, [[San Augustine County, Texas. Transfer from U.S. Office of War Information, 1944.]] Immunization, or immunisation, is the process by which an individual's immune system becomes fortified against an infectious agent (known as the immunogen). When this system is exposed to molecules that are foreign to the body, called non-self, it will orchestrate an immune response, and it will also develop the ability to quickly respond to a subsequent encounter because of immunological memory. This is a function of the adap