Apparently it goes first upwards to your central nerve system and brain and then downwards to your organs. How does it know which direction it is going and should be going? Is there some kind of signpost system in body?
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Think of it at spreading back along the nerves to your brain, and then out from there to everywhere else. Kind of like if the disease started at the end of a tree’s branch, spread to the trunk, then the other branches and roots.
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