NPR

What Causes A Rare Disease That Paralyzes Kids? Researchers Home In On A Virus

It starts out like a common viral respiratory illness but leads to terrifying symptoms, including paralysis. Could a common virus be behind the illness?
Evan Mazanec came down with AFM when he was 7, in 2014. It started with a fever and an ear infection, and lead to paralysis. He has since made a full recovery — he's back to playing baseball and living a full life.

The condition strikes young children. It can start with run-of-the-mill virus symptoms, like fever or sniffles. But, then the kids lose control of their limbs, may have trouble swallowing or breathing, or even end up paralyzed. This terrifying experience happened to more than 570 families since 2014, whose children were struck with an illness called acute flaccid myelitis, or AFM.

"It was really scary," says Susan Coyne, the mother of a son, Evan Mazanec, who developed AFM back in 2014 when

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