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New Stanford Study Reveals Immune Cells from the Body Routinely Migrate into the Aging Human Brain
For decades, the prevailing dogma in neuroscience held that the human brain was an immunological fortress, a "closed system" largely insulated from the immune defenses operating throughout the rest of the body. Protected by the formidable blood-brain barrier—a specialized network of vessels that restricts the movement of substances and cells from the bloodstream into the…
