The brain is like a medieval castle perched on a cliff, protected on all sides by high walls, making it nearly impenetrable. Its shield is the blood-brain barrier, a layer of tightly connected cells that only allows an extremely selective group of molecules to pass. The barrier keeps delicate brain cells safely away from harmful […]

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Link :
https://singularityhub.com/2024/07/29/how-a-mind-controlling-parasite-could-deliver-medicine-to-the-brain/