In National Geographic’s award-winning documentary, Body Snatchers, they reported, “Parasites have killed more humans than all the wars in history.” But how much do you know about them? From worms that cause cancer to brain worms, here are the facts…

A parasite is an organism that gets nourishment at the expense of the host. When a person begins to wonder about their declining health or energy, they’re often misdiagnosed. That’s what happened before an Australian woman had one removed from her brain…