Just in time for back to school: Nationwide outbreak of "mutant super lice"

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Back to school season is upon us, which means it's time for new school supplies, first day of school pictures, and that dreaded four-letter word: lice. But this year, it's not just exposure to regular lice that parents have to worry about: There's now a treatment resistant "super lice" that's spreading across the United States.

A whopping 42 out of 48 states tested are overrun by this so-called super lice, according to a study published in the Journal of Medical Entomology. In these 42 states, according to NBC's Today show, 100 percent of the lice tested were resistant to over-the-counter treatments.

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