Mystery child paralysis infections appear played out in Colo.

Photo: Enterovirus 68
More than 500 cases of Enterovirus 68 were confirmed in 43 states and the District of Columbia during 2014.

The mystery illness that afflicted 14 Colorado children with some paralysis last fall appears to have completely run its course. The illness, known at Acute Flaccid Myelitis, can cause facial drooping and muscle weakness.

"In Colorado we didn’t see any additional cases after that first group,” said state epidemiologist Lisa Miller.

In October, doctors said that new cases of Acute Flaccid Myelitis were winding down. At that time, two children were still hospitalized.

Now all the children have been discharged from the hospital, though most still have some residual weakness in their arms or legs.

Nationally, 103 cases of the virus were confirmed in 34 states, according to the CDC. It may be linked with enterovirus, a respiratory virus.