You see all kinds of animals drinking from puddles, ponds, etc and they are fine, whereas us humans can’t do it without getting sick.
In: Biology
Almost every (wild) animal is riddled with parasites, microbes or larger critters that are making them less healthy. Meanwhile, humans in developed areas are comparatively parasite free.
Adding a parasite to an infected animal will only marginally change their health, but adding one to an uninfected human can drastically hurt their health.
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