Acute Flaccid Myelitis (AFM)

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About Acute Flaccid Myelitis

Learn about symptoms of AFM and how it's diagnosed.

What is AFM?

Acute flaccid myelitis (AFM) is a rare but serious 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. We are working closely with national experts to better understand AFM and the outbreaks.
Learn About AFM

AFM Cases and Outbreaks
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What CDC is Learning
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Clinicians and Health Departments
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Page last reviewed: June 28, 2019
Content source: National Center for Immunization and Respiratory Diseases, Division of Viral Diseases