Acute Flaccid Myelitis (AFM)

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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.
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New AFM Report

New CDC Vital Signs report focuses on the 2018 AFM outbreak in the U.S.

Father stands over sick son in hospital bed. Doctor writing on clipboard.

New AFM Report

New CDC Vital Signs report focuses on the 2018 AFM outbreak in the U.S.

Doctor talking with mother and her son

About Acute Flaccid Myelitis

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

How to spot symptoms of AFM in your child

How to spot symptoms of AFM in your child

Acute flaccid myelitis, or AFM, is a rare but serious condition that affects the nervous system.

man holding his wrist

Symptoms

Mother helping child wash her hands

Causes & Prevention

Doctor examining girl's elbow

Diagnosis & Treatment

AFM Investigation
Clinician using microscope
Clinicians & Health Departments
Doctor talking with mother and her son
Page last reviewed: June 28, 2019
Content source: National Center for Immunization and Respiratory Diseases, Division of Viral Diseases