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Your immune system doesn't simply weaken with age; it reshapes itself in ways that change your risk for infections, cancer, and autoimmune disease, which affects how well your body recovers and stays resilient over time
Women develop a more reactive and inflammatory immune system as they age, which strengthens defense against infections but raises the likelihood of autoimmune conditions where the body attacks its own tissues
Men experience fewer overall immune changes but are more likely to develop silent high-risk cell patterns linked to cancers, allowing disease risk to build without obvious warning signs
Your lifelong exposures to infections, stress, diet, and environment create a unique "immunobiography" that determines how effectively your immune system responds to threats later in life
Daily habits such as nutrition, sleep, stress management, and sun exposure directly influence how your immune system ages, giving you a practical way to lower inflammation and improve long-term health outcomes