Lice crawl from one strand of hair to another. They don't jump, they don't fly, but they travel and spread like wildfire.
"People taking group selfies, it's just like a chain reaction," said Hickman. "You take a picture with one person, you're taking a picture with another person. That bug can actually spread that quick."
The research into mutated lice still has to be independently evaluated, but it's not entirely surprising that over the years, over-the-counter medication may not be as effective as it once was.