I haven’t read the article in question, but one particular parasite that cats have that “harms” humans are Toxoplasmosis. It’s wants to live in mice but breed in cats. In order to accomplish this, it makes the mice seek out cats, to then be eaten. It does this by altering the mice brain chemistry. If humans get Toxoplasmosis, we tend to become very fond of cats, which is where you see “Crazy cat ladies”.
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