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Acute flaccid myelitis (AFM) is a rare but serious syndrome
(a pattern of symptoms) that causes limb weakness, mostly
in children. Three national outbreaks have occurred starting
in 2014, when CDC began surveillance for AFM.
- 233 AFM cases occurred in 41 states in 2018.
- The average age of patients with AFM was 5 years.
- On average, CDC received reports of suspected AFM cases 18 days after patient's limb weakness began.