Including clinical trials the vaccine has been given to people for a year now. if your headline were true we should see thousands of people dropping dead within months of getting the vaccine. In other words it should have happened already.
Around 3,000 people each year die from food poisoning. I don’t exactly see a comparable number to that, and we don’t seem to worry much about that particular ‘threat’.
Are you saying the vaccine was available in January 2020?
So clinical trials on mRNA vaccines lasting for ~6 months is sufficient for you, despite the experiment design?