There has been a flood of anecdotal reports on social media of thyroid dysfunction and new thyroid diseases following COVID-19 mRNA vaccination, for both Pfizer and Moderna.
A new Japanese study by Morita et al., of 70 healthcare workers showed increased thyroid auto-antibodies following 2 Pfizer jabs as well as booster shot (click here).
These effects were long-lasting (> 32 weeks). The increase of thyroid auto-antibodies (TRAb) after 2 jabs and after booster jab can be seen in the graph below:
