About Acute Flaccid Myelitis

  • Acute flaccid myelitis (AFM) is an uncommon but serious neurologic condition. It affects the nervous system, specifically the area of the spinal cord called gray matter, which causes the muscles and reflexes in the body to become weak.
  • Increases in AFM cases have occurred in 2014, 2016, and 2018 in the U.S.
  • Most AFM cases (more than 90%) have been in young children.
The nervous system: brain, spinal cord, and nerves

Page last reviewed: December 29, 2020