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Body & Brain

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PET scans

TANGLED The brain of a person with Alzheimer’s disease symptoms (right) is laden with tau protein (red), while a person with no symptoms (left) has little tau.

HIV infecting a T cell

OFFENSIVE MEASURES  A combination of powerful antibodies might be able to stop HIV (yellow) before it infects, as is happening to a T cell (blue) in this colorized micrograph.

brown bat

BAT BRAINS  A big brown bat (Eptesicus fuscus) participates in experiments at Johns Hopkins University’s high-tech bat laboratory.

Body & Brain

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