A “fact check” by USA Today consists in the sole point that “Pfizer, Moderna and Johnson & Johnson each discussed their vaccines’ animal studies in press releases.”
Because we all know that big corporations funded by the federal government always tell the truth.
As I understand it, they did rush the vaccines greatly and skipped comprehensive animal trials. What little animal testing they did came to this: they got a powerful antibody response, but this is precisely what killed the animals later upon exposure through a kind of autoimmune reaction or pathogenic priming.
Maybe humans are harder to kill than animals, I don’t know. But animal responses offer no comfort in themselves.