Most recent medically-attended infection diagnoses within 1 through 42 days prior to confirmed Guillain-Barré syndrome (GBS) onset, by recent influenza vaccination^a status, Vaccine Safety Datalink, 2009–2011.

a2009–10 monovalent inactivated influenza vaccine or 2010–11 trivalent inactivated influenza vaccine. bThere may be >1 medically-attended infection diagnosis on the same day, resulting in more infection diagnoses than GBS patients. cThe patient with a diagnosis of infectious diarrhea also tested positive for Campylobacter jejuni.