AIM AND PURPOSE OF THIS WORK Basic Health Knowledge as Individual’s Personal Responsibility This Preface serves as a general introduction to the series of my five compiled health information books on fever, infection, immunity and the immune system, and immune-boosting, except for minor modifications exclusive to the topic or concern of each book. The common theme in the five books is INFECTION, for its peculiar subterraneous involvement in the process of many diseases about which most people have little or no knowledge of the origin and development. I stumbled on the information on infection as a singular culprit in many febrile diseases often mistaken as malaria or typhoid because of their common fever symptoms. My aim and objective, and so, the focus, in the health information compilations are, the same in all the four books: enlightenment and warning about the wrath of infection, and proactive measures against it as a major threat to human health generally. The lack of the knowledge of infection is not only the commonest cause of break down in individual personal health but also the break down in community health, such as epidemics of infectious diseases frequently happening in African populations with serious life-threatening consequences. The majority among the large population of African communities lack the knowledge or clear understanding of what infection is; nor are they aware of their individual personal susceptibility to infections. Most people in African communities are indeed sub-healthy. Trained nutritional healthcare professionals see the signs even on the faces of most people - a condition that usually exposes most of the people to the strains of harmful microorganisms and opportunistic infections with serious consequences. No wonder, epidemic diseases in African communities spread like wild fire, killing hundreds at a go. Desperate Need for Immune-boosting Strategies (Book Four) Book four focuses on highlighting and addressing the base line of health – strong immunity, as it concerns every age group of human being in the African community generally: in pregnancy, childhood, adulthood and the ageing. There is no doubt that the perennial malnutrition of the African populations has been the real cause of the frequent outbreaks of infectious diseases in the continent.11