"Any widespread effort to force the hand of vaccine manufacturers would require considerable human suffering. Heroic refusals by adults are laudable, but parents have a moral obligation to secure the life and health of their children. As with so many issues of this type, it appears that the only proper recourse is to make appeals for redress to our legislatures and our courts. The true scandal here is not that Catholics use these vaccines, but that the researchers and scientists who bring us these products do not take into sufficient account the moral convictions of millions of their fellow citizens."
January 1, 1970
https://en.wikiquote.org/wiki/Use_of_fetal_tissue_in_vaccine_development