Immunologist Jenna Macciochi reveals the “wellness system” linking body and brain, urging us to focus on healthspan as well as lifespan. She explains “immune age,” inflammaging, and the body’s cycle of inflammation and repair, showing how stress, mind, and lifestyle choices—from sleep and movement to diet—shape immunity.

Amid chronic stress, isolation, and processed diets, Macciochi offers evidence-based habits: meditation, community, smart nutrition, and supplementation. She recasts immunity as a lifelong practice aimed not just at living longer, but living better.

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