Billie Iverson may be getting up there, but for an 86-year-old, she's still plenty active.
"I take trips, and I go do my own shopping, and I take myself to the doctor," Iverson says. "I do everything. I don't let anything stop me."
But one day, she got hit with something she'd never experienced — the worst case of the runs ever.
For days at a time, off and on for weeks, the problem kept coming back. Iverson eventually got so weak, she ended up in a nursing home.
"I just thought maybe I wasn't going to make it," she says. "I thought I was going to die."