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If you are a rat and you have toxoplasmosis,
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you are perfectly healthy except for one thing.
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The toxoplasmosis rewires your brain
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and it makes you less afraid of cats.
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Now, again,
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this is not some sort of bizarre quirk of a humorous god.
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Rather, it's because this is a perfectly--
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this is the adaptive strategy of the toxoplasmosis virus.
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In fact, a real powerful virus
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would skip the respiratory system altogether,
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even better than a cold virus.
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What it would do is it would take over the brain