in rare instances it causes pneumon pneumonia, like what killed jim henceon. but it's led to the flesh-eating bacteria, she's one of several hundreds cases in the u.s. every year. experts say the bacteria affects everyone differently, depending on mr. immune system. kprpts say she most likely inhaled the bacteria. it seltsed in her body at the cite upon an injury on the back of her leg. >> it gets in the blood stream, finds this area of muscle injury and stops there, sets up shop and begins to cause serious infection. >> reporter: aimee copeland fell victim to a perfect storm of sirk, first the gash on her leg, then falling into the fedit river. >> that water clearly was the cause, the source. no doubt. >> the treatment coop sifts of large doses of antibiotics and surgery. about one in five cases, the disease is fatal. copeland is now showing signs of recovery, today asking for books and smiling. >> i believe we've had victory over death here. >> reporter: one friend has said the infection has stopped spreading and they're hoping it was caught in time. >>> com