I probably stepped into a bear trap with my last post, but that's okay. Ideas need to be questioned in order to be validated, and if an idea is true then it should be able to stand up to criticism.
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I will just add that I have never seen any pre-Vatican II book say that it is immoral to receive a vaccine that was created with the help of aborted fetal tissue. While this is probably because such an idea was unthinkable before Vatican II, you will certainly see them explain that involvement with the sins of others is only sinful if one's involvement somehow helps the sin be committed, or directly cooperates in some way. That is the link that I think is completely missing between the customer in Walgreens getting his flu shot, and the abortion doctor murdering the baby whose cells are used to develop the medicine being injected into the guy in Walgreens. The latter is not helping the former in any way that I've ever seen demonstrated.
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Okay, you guys can bring the flames now. 
The SSPX says there’s no problem with remote and passive cooperation in evil if there is grave inconvenience.
That’s the argument of the 2005 Vatican docuмent which they have endorsed.
++Vigano seems to be saying using such vaccines is intrinsically evil (ie., their use allows for no exceptions).
To make this argument, ++Vigano needs to show that the object of the act is evil, in which case, neither circuмstance nor intention can make the act permissible.
So what is the object?
Properly identifying the object is where theologians and biased commentators can get cute.
Consider a man about to drink poison because he fears being captured by the enemy:
Is the object simply “drinking,” with the drink being a poison a mere circuмstance?
Or is the object “drinking poison,” with the poisonous nature of the potion being inseparable from the drinking?
I suspect there will be arguments about this, but if we return to the matter at hand:
Is the object merely “being vaccinated,” (in which case it is only the intention and/or abortive circuмstances which would make the act evil, as the SSPX is implicitly arguing)?
Or, is the object “using abortive vaccines," with the abortive nature of the vaccine being morally inextricable from the act (as ++Vigano seems to be arguing)?
In any case, now that ++Viganò’s position is clear and indisputable, I hope he will take the next step and defend it against the 2005 docuмent which his opinion clearly opposes.