Acute Flaccid Myelitis (AFM) in the United States Update. | CDC

AFM Cases in the U.S. | CDC

For the most recent information about confirmed AFM cases in the United States,  see AFM Confirmed U.S. Cases.

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AFM Cases and Outbreaks

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• Annual AFM Cases by State
• Cases by Month, 2014-2019

There are 33 confirmed cases in 2019 out of 131 reports of patients under investigation (PUIs). CDC, state, and local health departments are still investigating some of the PUIs.

There have been 603 confirmed cases since CDC began tracking AFM in August of 2014. CDC has been thoroughly investigating cases since that time. We have seen increases in AFM cases, mostly in young children, every two years.

No deaths were reported during the acute illness of patients with confirmed AFM who had limb weakness onset in 2018 and 2019; however, there were two reports of patients confirmed with AFM in 2018 who died months after limb weakness onset. We have also learned of deaths in cases confirmed in previous years.