Reading about parasites is a little like looking at pictures of skin cancer. It's an unappealing undertaking necessary for the sake of becoming informed. The fact is that parasites are widespread and can cause a tremendous burden of disease in both humans and animals. In humans, there's a tendency to think that parasitic infections occur elsewhere—in distant, underdeveloped areas of the tropics and subtropics, but in fact they occur in more temperate climates and in highly developed countries, including the United States.
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