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This book presents studies of the main conditions that affect health and well-being of old people. Considering the present scenario of COVID-19, the effects of this viral infection on individuals older than 65 years are also discussed. The content enables professionals of health and government for the present and future actions in this important area. Readers go through the changes occurring in organs and tissues that can interfere with susceptibility to infections, low response to vaccines, cancer, and loss of cognition during the aging process. A discussion of the central role played by the immune system in the age-related diseases and how the immunity can be impaired during the ageing process is presented. Possibilities to circumvent these conditions via healthy habits in diet, physical exercise, and new pharmacological interventions are part of the content. This book discusses how human healthy longevity is dependent, at least inpart, of a functional immune system. Chapters were written for researchers in the field of aging and is especially suited for those interested in the study of immunosenescence and inflammaging affecting the health of old individuals.

Immunosenescence is an imprecise term used to describe deleterious age-associated changes to immune parameters observed in all mammals studied so far. It represents a rapidly progressing science in the aging field, with a vertiginous volume of new data, knowledge and concepts concerning these changes. We are poised to be in a position to translate these accumulated data into the clinical setting via better understanding of the contribution of immunosenescence to age-associated pathologies, and their prevention by appropriate interventions. This authoritative handbook seeks to encompass the current state of our knowledge on the multitude of those changes to immunity related to aging, with contributions from experts in the research and clinical areas. This book therefore considers methods and models for studying immunosenescence; cellular immunosenescence of T cells, B cells, neutrophils, antigen presenting cells, NK, NKT and stem cells; genetics; mechanisms including receptors and signal transduction; mitochondria; proteasome; cytokines; neuro-endocrine-immune networks; inflammation; thymus; clinical relevance in disease states including infections, autoimmunity, cancer, metabolic syndrome, neurodegenerative diseases, frailty and osteoporosis; modulation by nutrition, lipids, vaccination and the question “can interventions to influence immunosenescence be realistically proposed based on our current state of knowledge?”.

“Immunosenescence” is an imprecise term used to describe deleterious age-associated changes to immune parameters observed in all mammals studied so far. It represents a rapidly progressing science in the aging field, with a vertiginous volume of new data, knowledge and concepts concerning these changes. We are poised to be in a position to translate these accumulated data into the clinical setting via better understanding of the contribution of immunosenescence to age-associated pathologies, and their prevention by appropriate interventions. This authoritative handbook seeks to encompass the current state of our knowledge on the multitude of those changes to immunity related to aging, with contributions from experts in the research and clinical areas. This book therefore considers methods and models for studying immunosenescence; cellular immunosenescence of T cells, B cells, neutrophils, antigen presenting cells, NK, NKT and stem cells; genetics; mechanisms including receptors and signal transduction; mitochondria; proteasome; cytokines; neuro-endocrine-immune networks; inflammation; thymus; clinical relevance in disease states including infections, autoimmunity, cancer, metabolic syndrome, neurodegenerative diseases, frailty and osteoporosis; modulation by nutrition, lipids, vaccination and the question “can interventions to influence immunosenescence be realistically proposed based on our current state of knowledge?”

Human immunosenescence contributes to morbidity and mortality in later life. The age-associated increasing incidence of cancer and cardiovascular disease plateaus at around 80 years of age in industrialised countries, but death due to infectious disease continues to increase up to 100 years of age and beyond. Understanding the reasons for age-associated alterations to protective immunity in the elderly would facilitate the development of interventions to reconstitute appropriate immune function, increase responsiveness to vaccination and extend healthspan. The majority of the papers collected in this volume therefore address not only the mechanisms responsible for immune ageing in humans but consider what might be accomplished to redress the erosion of immune competence with age.