This is not the first mRNA vaccine. It's the first to reach full approval, but we've been testing them in humans for a decade now. https://ec.europa.eu/research-and-innovation/en/horizon-maga...
And they have failed every time until now.
Re:FDA Approves First Covid-19 Vaccine
by thehappypm on Monday August 23, 2021 @10:36AM
(#28276410)
I actually think your analogy of self-driving cars is a good one. If a billion people had safely rode in self-driving cars in the last year, and it saved hundreds of thousands of lives, I think we'd be approving them too.
But I do not believe that this is valid at all, being that this is the very first mRNA vaccine.
>By looking at other vaccines historically and seeing that side effects tend to happen in the first few weeks.
I feel like what you are saying is basically like someone asking "How do we know that self driving cars will be safe on the road" and you responding with, "well obviously by looking at the history of cars, we have been doing them for a century!"