I'm not saying vaccines are harmless. But the NIH specifically says that "the cases of severe side effects from a TDAP vaccine are so inconsistent that it's impossible to even credit the TDAP as the reason for the side effects." - see link here. https://www.ncbi.nlm.nih.gov/books/NBK234368/
There are several studies to that effect. Cite a single reputable peer-backed paper that cites that TDAP regularly causes "severe injuries" in any way.
(Hint: You can't - not without cherry-picking data and ignoring science and facts in favor of your feelings. Vaccinate your kids. I don't want my immunocompromised students in my classes getting sick because you're being selfish and rejecting science.)