What causes Guillain-Barre syndrome (GBS)?

Scientists do not fully understand what causes GBS, but it is believed that stimulation of the body’s immune system may play a role in its development. Here’s what scientists know for sure:

• About two-thirds of people who develop GBS symptoms do so several days or weeks after they have been sick with a diarrheal or respiratory illness.
• Infection with the bacterium Campylobacter jejuni is one of the most common risk factors for GBS.
• People can also develop GBS after having the flu or other infections (such as cytomegalovirus and Epstein Barr virus).
• On very rare occasions, they may develop GBS in the days or weeks following receiving a vaccination.

For more information about Guillain-Barré Syndrome see:

• National Institute of Neurological Disorders and Stroke Information Page
• Fact Sheet: Guillain-Barré Syndrome 

Last Reviewed: 09/08/2010

• What is Guillain-Barre syndrome (GBS)?
• Do vaccines cause Guillain-Barre syndrome (GBS)?
• How common is Guillain-Barre syndrome (GBS), and how common is it after people are vaccinated for seasonal flu?

• Vaccines
  • Health Issues & Vaccines
    • Guillain-Barre Syndrome (GBS)