I guess this relationship still needs to be tested, but it's an interesting possibility.
Immunity to tetanus is protective against the development of multiple sclerosis
Verstraeten T, Davis R, Destefano F.
Epidemic Intelligence Service (EIS) Program, Epidemiology Program Office, Centers for Disease Control and Prevention, Altanta, GA, USA.
Following allegations that Hepatitis B vaccination causes or triggers multiple sclerosis (MS), several epidemiological studies have been conducted to evaluate the association between MS and vaccination.