It takes a lot for someone to stop, look around and admit that they were wrong.
My parents sent me a letter back in 2020 essentially pleading with me to get vaccinated and I, long reply short, told them that I would not be participating in their mass scale clinical trial. We did not talk for a few months after that and they did not come by.
I'm not anti-vax by any means... but I am not jumping into something blindly without a historical record to associate with it. "Safe and Effective" rings similar to "Trust me, Im from the government.". I also think back to the many 'safe and effective' items that have been proven to be the opposite