FOI release

Surveillance Data Relating to Thyroid Dysfunction Post-COVID Vaccination

Some or all of the information requested may not have been provided because we required clarification from the requester.

Case reference FOI2025/01340

Received 30 December 2025

Published 5 May 2026

Request

Please provide the following under the Freedom of Information Act: 1. All internally-held epidemiological analyses (published or unpublished) relating to thyroid dysfunction following any COVID-19 vaccine. 2. All Yellow Card signal assessments conducted for: * hypothyroidism * thyroiditis * autoimmune thyroid disease * vaccine-induced endocrine dysfunction 1. 2. Internal risk assessments relating to endocrine adverse events. 3. Any correspondence between MHRA and DHSC discussing thyroid-related vaccine injury signals. 4. Copies of internal deliberations where MHRA decided not to list thyroid conditions as adverse reactions in SmPC documentation. 5. Any document that evaluates the adequacy of current post-marketing surveillance for endocrine disorders.

Response

See attached

Documents

• FOI2025_01340 Response (redacted).pdf (1.2 MB)

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