Should we be concerned about other long term side effects from mRNA vaccines?
A concern that deserves mention is the possibility that a cross-reaction and immunity to other parts of the spike protein could cause auto-immune disease or other problems.
A former Pfizer VP, Dr. Michael Yeadon, who has over 30 years of experience in immunology and drug research, filed a Stay of Action petition with the European Medicine Agency (like our FDA) to halt the trials of mRNA vaccines over concerns it might affect sterility in women.
Yeadon is worried that the mRNA vaccine was coded for a region of the spike protein that was similar to Syncytin-1, which is a protein that is essential for the development of the placenta. If a woman’s body makes antibodies to this protein, she could become sterile when vaccinated for COVID-19. This is a theory, not a proven fact, and no one has studied it. Yeadon’s insistence on more studies to make sure this will not happen seems reasonable.