Immune System Changes After 40 and 60

A comprehensive study clearly shows that changes in the immune system do not occur gradually and continuously; rather, they accelerate around the age of 40 and after 60. The findings reveal two main waves of immune changes: the first at around 40 years old, highlighting the role of "CD4 T" cells that assist in regulating the immune response, and the second after 60, characterized by the activation of "CD8 T" cells responsible for destroying infected cells. This process coincides with a decline in the function of important genes and an increase in inflammation, with observed differences between men and women regarding the timing of these shifts. The study notes that these changes do not happen suddenly at a specific age but occur over period-specific phases. Understanding this progression helps explain why susceptibility to diseases increases with age, potentially guiding better timing for preventive interventions.

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