When the ribosome is confronted with a string of these modified bases called N1-methylpseudouridine in the mRNA, it slips around 10% of the time causing the mRNA to be misread and unintended proteins to be produced – enough to trigger an immune response>
The finding that unintended proteins may be produced as a result of vaccination is sufficient cause for regulators to conduct full risk assessments of past or future harms that may have ensued. We note that regulators have previously failed to insist on the study and assessment of risk of the pharmacology and toxicology of novel spike protein heterotrimers forming after injection of the bivalent COVID-19 modRNA vaccines.
That can cause many serious issues like cancers which you wouldn't like to share.
Most serious is the protein generation.
https://www.researchgate.net/publication/376265782_Ribosomal_frameshifting_and_misreading_of_mRNA_in_COVID-19_vaccines_produces_off-target_proteins_and_immune_responses_eliciting_safety_concerns_Comment_on_UK_study_by_Mulroney_et_al
That can cause many serious issues like cancers which you wouldn't like to share.
https://scitechdaily.com/how-a-certain-protein-can-cause-deadly-cancers/