Two irreconcilable legal perspectives are at issue. The left denies the existence of a moral law, while the pro-life position affirms a universal moral law.
In determining the moral liceity of using vaccines derived from abortion, an assessment of cooperation with evil in terms of distance from the original abortion is a necessary, but ultimately insufficient criterion because there is another distinct and more immediate category of sin involved.
Women who sent in their purity rings were given a 'certificate of Impurity' in exchange by the female pastor, which urged them to live a 'SHAMELESS…life'.
This revised version of my 2012 blog post is even more important today, given current division in the pro-life movement while we have the most pro-life president ever.