U.S. cases of a polio-like illness rise, but there are few clues to its cause

Author: Aimee Cunningham / Source: Science News

STILL RECOVERING Chase Kulakowski, now aged 3, developed acute flaccid myelitis in October 2016. What started as a runny nose quickly progressed to a having lifeless right arm, the Chicago Tribune reported. But surgery and physical therapy has given Chase use of his arm again.

The cause of a rare polio-like disease continues to elude public health officials even as the number of U.S. cases grows.

Confirmed cases of acute flaccid myelitis cases have risen to 90 in 27 states, out of a possible 252 under investigation, the U.S. Centers for Disease Control and Prevention announced November 13. That’s up from 62 confirmed cases out of 127 suspected just a month ago (SN Online: 10/16/18). There were a record 149 cases in 2016.

“I understand parents want answers,” Nancy Messonnier, director of the CDC’s National Center for Immunization and…

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