In many places, especially on the net, You have to say "the vaccine is completely safe all the time", not "the vaccine is overwhelmingly safe and effective, some may be at risk of life threatening blood clots, and vaccination does not entirely prevent infection, nor does it guarantee significant protection from future mutations which are expected to continue".
You especially cannot talk about CDC data, you can't compare death/injury of other things, and you can't talk about the 1920's influenza outbreak that killed half a million people.
If you try to talk about those things, you're shamed as a crazy anti-vaxxer whom is going to kill everyone. Even if you've been vaccinated and follow CDC guidelines.
That's how new anti-vaxxers are being made. Otherwise reasonable people are being told they're crazy anti-vaxxers for simply talking about facts, asking important questions, pointing out inconvenient data. The actual experts whom can talk about such things are being drowned out by the flood of reactionaries.