ABSTRACT

CHAPTER ONE

1.0INTRODUCTION

We are constantly being exposed to infectious agents and yet, in most cases, we are able to resist these infections. It is our immune system that enables us to resist infections.  The immune system can be defined as a network of lymphoid organs, tissues and cells and also the products of these cells. The main function of immune system is to protect the body against infectious microbes or foreign substances (Abbas and Lichtman, 2005). Each structure of the immune system has a relatively fixed architecture of specialized organs, compound of lymphoid tissues, cells and chemicals. It has the ability to respond to antigen such as microbe or various macromolecules that is recognized as non-self or antigen. The success of this system in defending the body relies on an incredibly elaborate and dynamic regulatory communication networks, that involves multiple and functionally differing cell types which provide a large variety of defend mechanisms. The outcome is a sensitive system of checks and balances that produce an immune response that is prompt, appropriate, effective and self-limiting

TABLE OF CONTENT

CHAPTER ONE 

INTRODUCTION

CHAPTER TWO 

LITERATURE REVIEW

CHAPTER THREE

RESEARCH METHODOLOGY

CHAPTER FOUR

DATA PRESENTATION AND ANALYSIS

CHAPTER FIVE

SUMMARY OF FINDINGS, CONCLUSIONS AND RECOMMENDATIONS

BIBLIOGRAPHY