While GBS is more common in men and adults older than 50, anyone can develop it, the agency says.
In GBS, an individual’s immune system damages the nerves, causing muscle weakness and sometimes even paralysis.
GBS symptoms can last from a few weeks to up to several years.
While most people fully recover from GBS, some are left with permanent nerve damage and others have died.
Infection with Campylobacter jejuni is one of the most common risk factors for GBS and people can also develop it after some other infections including flu, cytomegalovirus, Epstein-Barr virus and Zika virus.
While GBS is not contagious, outbreaks of germs associated with it can lead to clusters of people with GBS.
Symptoms of the disorder include weakness or tingling sensations in both legs, often spreading to the arms and upper body.
The National Institute of Neurological Disorders and Stroke explains additional symptoms include difficulty with eye muscles and vision, difficulty swallowing, speaking or chewing, severe pain at night, coordination problems and unsteadiness, problems with bladder control or digestion and abnormal heartbeat/rate or blood pressure.
Symptoms can heighten, progressing over hours, days or weeks – though weakness typically peaks within the first two weeks after symptoms appear.
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