> The problem I've had with MRNA vaccines is that we decided a lengthy multi-year trial protocol was necessary to ensure vaccines are safe and effective.
I, actually, agree on this. It was hard balancing act of protecting the population (quite successfully I will note) vs lack of perfect certainty about safety. I've read there've been clinical trials of other mRNA vaccines in mid 2010s so there've been some research data available.
Now, on other hand, we have a lot of data to dig into and seemingly to prove safety of the vaccines.
> Moreover, at one point they wanted to force [2] them on the population.
Yeah, I think this wasn't a good idea. Especially after it was clear we're not getting full protection and covid turning to be endemic.
> If the vaccine really is safe and effective, why was the waiver necessary?
Balancing act mentioned above protecting suppliers, won't be surprised if it was part of negotiations between government and vaccine manufacturers.
I think we can see mRNA vaccine are mostly safe (and we'll get even better certainty about it as time passes) which is given how cool the technology is opens up a lot of opportunities.