Yves Boyer v. HHS - Tdap, multifocal motor neuropathy with conduction block (MMNCB) (2025)

On May 31, 2024, Yves Boyer filed a petition alleging that a tetanus-diphtheria-acellular pertussis (Tdap) vaccine administered on June 7, 2021 caused multifocal motor neuropathy with conduction block. The public decision identifies petitioner as an adult but does not state an exact age.

The petition was filed without supporting documentation. After the initial order required statutorily required records and other supporting materials, petitioner filed some medical records on July 5, 2024, but no additional supporting documentation.

On November 4, 2025, petitioner moved for a decision dismissing the petition, acknowledging that dismissal would end all Vaccine Program rights in the claim. Chief Special Master Corcoran dismissed the case on November 5, 2025 for insufficient proof.

He found that petitioner alleged an off-Table injury but had not submitted evidence establishing the Althen prongs, such as an expert report proposing a medical theory, and had submitted insufficient medical records to establish the basic requirements of the Vaccine Act. No compensation was awarded.