A powerful excerpt:

"Stated Fr. Stephen Torraco, Professor of Moral Theology at Assumption College regarding the need for these vaccines:

Saying that something is morally justifiable because I need it as a means to an end, and indeed, a good end (preservation of one’s life) is absolutely identical with the Machiavellian principle that the end justifies the means (or, that evil may be done in order to accomplish good) and, thus, absolutely unacceptable and morally indefensible…. Secondly, precisely because this Machiavellian principle is morally indefensible, one needs to examine the very thing needed in this particular case ¾ cell lines from aborted fetuses. To say that one needs the cell lines of aborted fetuses to preserve one’s life is inseparable from saying that one needs the abortions ¾ intrinsically evil actions ¾ that make the cell lines available… If I need the vaccine (and it is a need that can be satisfied only by an aborted fetus) and if I defend my need, I will the abortion. The person receiving the vaccination may well be living long after the fetus was actually aborted, and had no involvement in and may even have no knowledge of the particular and actual fetus that was aborted. However, the remoteness in time is not sufficient for arguing that there is no act of the will on the part of the recipient of the vaccine.” [54]

Whatever is taught in medical schools by Catholic ethicists, theologians, approved by bishops, when God comes to judge anyone who co-operates in abortion, He knows the extenuating circuмstances which may or may not exist and be used to justify the evil act, and will judge justly.

Yes, I made this exact argument in my stolen cars analogy.  In seeking or willing the effect, you are in fact willing the cause ... and the fact that it happened posterior in time doesn't change the priority of the act in terms of causality.  What's more, by providing a market for these vaccines (rather than refusing to use and to buy them), one is actually participating in CAUSING the abortions in the first place.  When you become part of the formal motive for the evil act, that is no longer merely material participation, but rather formal participation.

It's the exact same thing as my other comparison.  I hold a loaded gun up to a person's head and pull the trigger.  Now, I do not "want" this person to die.  Nevertheless, by having willed and even effected the cause of his death, I did in fact will his death and am formally guilty of it.  This subjectivist "well, I really don't WANT the effect" is relativistic hogwash and needs to be discarded ASAP.  It has done a lot of harm in the realm of moral theology and actually lays the groundwork for how Bergoglio can claim that cohabitation with fornication can in fact not be a sin.

In seeking or willing the effect, you are in fact willing the cause ... and the fact that it happened posterior in time doesn't change the priority of the act in terms of causality.

I hold a loaded gun up to a person's head and pull the trigger.  Now, I do not "want" this person to die.  Nevertheless, by having willed and even effected the cause of his death, I did in fact will his death and am formally guilty of it.

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The formal motive for abortion is not the production of vaccines. The formal motive for abortion is the desire to be rid of an unwanted child.

No, there can be multiple formal motives, not only among the various participants in the evil, but even within the mind of any given participant.

Perhaps the primary formal motive of the mother was to get rid of an unwanted child.  But perhaps the abortionist wants to make money, and some abortionists want to harvest fetal cells for various medical purposes.  Even the mother's formal motives might be driven by other motives, such as wanting to be more successful economically, etc.

Similarly with the automobiles, the formal motive of the criminal is to make money.  But in order to make money, he needs to intend the cause, i.e. the stealing of cars.

So objective right and wrong needs to be determined from cause-effect analysis rather than from motivation or intention.

In any case, the use of fetal cells for various "medical" purposes is A cause of abortion, a cause for at least SOME abortions ... and that is all which is needed to make the use of these fetal cells be a morally depraved action.

So, for instance, we might have Planned Parenthood pushing women to have abortions because, among other reasons, they're making money by selling the fetal tissues.  So with most moral acts there are layers and layers of motives and/or causes.  To claim that the only motive for abortion is to get rid of an unwanted child, that's simply incorrect.

So objective right and wrong needs to be determined from cause-effect analysis rather than from motivation or intention.

In any case, the use of fetal cells for various "medical" purposes is A cause of abortion, a cause for at least SOME abortions ... and that is all which is needed to make the use of these fetal cells be a morally depraved action.

So, for instance, we might have Planned Parenthood pushing women to have abortions because, among other reasons, they're making money by selling the fetal tissues.  So with most moral acts there are layers and layers of motives and/or causes.  To claim that the only motive for abortion is to get rid of an unwanted child, that's simply incorrect.

objective right and wrong needs to be determined from cause-effect analysis rather than from motivation or intention.

Well said.  And indeed, there is no excuse for Yeti's and other posters' ignorance on these matters, because

if they would just read the threads already on here, and watch some of the videos posted, and read the sources others have posted on this issue, we would not see the errors & ignorance I see demonstrated here ad nauseam on this topic.
 [Not by Ladislaus, but a few others in this thread.]  

This video has been posted on CathInfo more than once.  For those who think that the abortions were just run-of-the-mill abortions done decades ago, and were not done for the purpose of making a vaccine, just spend a few minutes of your life watching this video:

https://youtu.be/uaMjO2gXaUo?t=175