Guillain-Barré syndrome may be triggered by:
Most commonly, infection with campylobacter, a type of bacteria often found in undercooked poultry Influenza virus, Cytomegalovirus, Epstein-Barr virus, Zika virus, Hepatitis A, B, C and E, HIV, the virus that causes AIDS, Mycoplasma pneumonia
Surgery, Hodgkin's lymphoma, Rarely, influenza vaccinations or childhood vaccinations
https://www.mayoclinic.org/diseases-conditi...es/syc-20362793What causes GBS?
Several things are known to trigger GBS. About two-thirds of people with GBS had diarrhea or a respiratory illness several weeks before developing symptoms.
Infection with Campylobacter jejuni, which causes diarrhea, is one of the most common risk factors for GBS. People also can develop GBS after some other infections, such as flu, cytomegalovirus, Epstein Barr virus, and Zika virus. Very rarely, people have developed GBS in the days or weeks after receiving certain vaccines
https://www.cdc.gov/campylobacter/guillain-barre.htmlMost cases usually start a few days or weeks following a respiratory or gastrointestinal viral infection.
https://www.ninds.nih.gov/Disorders/Patient...rome-Fact-SheetIt usually shows up a few days or weeks after a cold, stomach virus, or the flu. In rare cases, surgery or vaccinations can trigger it. You may hear your doctor mention “campylobacter.”
https://www.webmd.com/brain/what-is-guillain-barre#1 This post has been edited by MargaliuS on 25 Oct 2019, 11:55 
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