Unfortunately it isn’t just those two vaccines:
https://www.cogforlife.org/vaccineListOrigFormat.pdf
And it’s more than just 2 cell lines.
Having ‘gotten away with’ using the existing cell lines there’s no reason for them not to use more in the future.
I am glad I do not have to make the choice today. Shame on them for doing it that way. Still, if someone murders your child and your other child needs some vital organ transplant to save his life, they are a good transplant match, would you allow the transplant to take place? On the one hand, it is coming from a murdered child. On the other hand, you didn’t murder the child and it will save the other child’s life.
Another cell line needs to be developed for the sake of conscience. But using the existing one does not, in my opinion, make the user guilty of murder.