Basically you need to ask if it an mRNA "vaccine" like COVID. There are questions regarding traditional vaccines as there are risks. But the nature of the COVID shot is inherently problematic. Because rather than just introducing a weak/dead virus into your body and letting your immune system do it's thing, it hijacks your cells to produce damaging proteins. It was especially bad in the early days as producing billions of doses in a short period lead to absolutely awful quality control.