The process of growing older is known as aging. Among humans, it refers to the gradual accumulation of changes in a person's physical, psychological, and social characteristics over time. At the molecular and cellular level, ageing is caused by the accumulation of a range of molecular and cellular damage throughout time. This results in a gradual loss of physical and mental capacity, and an increased risk of disease and, eventually, death. These changes are not linear or continuous, and they are only tangentially related to a person's chronological age. Aging has an impact on both innate and adaptive immunity. Proinflammatory cytokines, such as IL-6 and TNF-and acute-phase reactants, such as C-reactive protein and blood clotting factors, all rise paradoxically as humans' innate immune system ages. The readers would gain knowledge that would broaden their perspective about healthy aging and the immune system through this book. Those in search of information to further their knowledge will be greatly assisted by it.