Acute flaccid paralysis or myelitis is characterised by rapid onset of weakness of an individual’s extremities, often including weakness of the muscles of respiration and swallowing, progressing to maximum severity within 10 days.

The term 'flaccid' indicates weakness accompanied by hyporeflexia or areflexia in the affected limb or limbs (UKHSA).

For all cases meeting the AFP/AFM case definition please download and complete this surveillance form.

Email completed forms to phs.flu@phs.scot

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Older versions of this publication

Versions of this publication released before 16 March 2020 may be found on the Data and Intelligence, Health Protection Scotland or Improving Health websites.

Last updated: 20 December 2023
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