How large a trial do you want to run to capture "rare conditions"? Millions? Billions of participants? How long do you want to run trials? Years? Decades?
There is a process in place that’s meant to capture a certain number of potential problems. I didn’t make that process. The people who are making drugs safe designed the process. There is never zero risk of a treatment behaving badly, of course but when a drug gets fast tracked and doesn’t go through the regular approval process, it just hasn’t been proven to be safe by the regular standard of what experts deem safe.
It’s not very complicated.
trials ok => drug most likely ok
trials not done => we don’t really know.
No, it is not about large trials. It is about changing the attitude of medical practitioners and the media that refuse to acknowledge a vaccine could have caused an adverse effect.
I understand that this is to not feed the vaccine hesitancy. But to anyone observing carefully, this is a crucial break in the information chain that can feedback any ill effects of any vaccine back to the creators.