The study found no evidence for an association between influenza vaccination and development of Guillain-Barré Syndrome.
Why this matters ?
Guillain-Barré Syndrome (GBS) is usually preceded by infection.
Stimulation of the immune system by vaccination may be sufficient to induce GBS.
Several studies have reported an increased incidence of Guillain-Barré Syndrome in people who received the 1976 and 2009 influenza vaccinations.