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Do IgA Levels Change with Age? Understanding the Lifelong Shift in Immunity

According to the University of Michigan, IgA levels are extremely low in newborns and gradually increase throughout childhood. Indeed, IgA levels change significantly over a person's lifespan, with a distinct pattern of development, stability, and potential decline. This article explores how and why **do IgA levels change with age**, affecting both mucosal and systemic immunity.