> Three more cases of Guillain-Barré were reported in early December, and the investigation into cases of it spread to eleven states. On December 16, a one-month suspension of the vaccination program was announced by Sencer. William Foege of the CDC estimated that the incidence of Guillain-Barré was four times higher in vaccinated people than in those not receiving the swine flu vaccine.
https://en.wikipedia.org/wiki/1976_swine_flu_outbreak
> Three more cases of Guillain-Barré were reported in early December, and the investigation into cases of it spread to eleven states. On December 16, a one-month suspension of the vaccination program was announced by Sencer. William Foege of the CDC estimated that the incidence of Guillain-Barré was four times higher in vaccinated people than in those not receiving the swine flu vaccine.