Anti-ganglioside antibodies were not detected in human subjects infected with or vaccinated against 2009 pandemic influenza A (H1N1) virus

► Recipients of 1976 H1N1 vaccine had an increased risk for neurologic disorder. ► Influenza hemagglutinin was reported to induce anti-ganglioside antibodies in mice. ► Absence of anti-ganglioside antibodies in human subjects infected with or vaccinated against 2009 pandemic H1N1 ► Absence of anti-ganglioside antibodies in eight confirmed cases of post-vaccination Guillain-Barré syndrome.