Earlier quoted context omitted.
We have no encouraging long term data from any mRNA therapy. this is brand new. The animal tests were concerning to put it mildly. Your chances of serious illness are lower for now. ADE shows dose dependent acceleration, so by the 4th or 5th booster it may be a different story.
This says that there was a viral Facebook post making claims about animal tests, which are very much wrong: https://fullfact.org/online/covid-vaccine-animal-testing/ Also, this says that the covid vaccines specifically passed animal trials: https://www.reuters.com/article/factcheck-covid-vaccine-anim...
Of course they “didn’t skip animal tests due to the animals dying” the animals couldn’t have died if they skipped the test! Use primary sources for scientific arguments.