Chapter 18, Problem 1MC

Summary Introduction

Introduction:

Immunization refers to the process of making an individual’s body immune to a pathogen or foreign agent that jeopardizes the individual’s health. This foreign body that elicits immune response in body is known as immunogen. Active immunity refers to the immunity gained by exposing the body to an antigen (a foreign substance that elicits an immune response in body by inducing the production of antibodies). Active immunity usually takes weeks or days to develop but is usually lifelong.