Thalidomide is out of your system by your first grandchild.
That's exactly what the parent commenter said. Your children are affected, but your first grandchildren should be safe.
The poster implies that there could be unknown long term effects of a vaccine, and conflates long term effects with birth defects, which, of course, appear only after a fetus has developed enough to spot defects in a sonogram or other imaging. It's a scare tactic.