In order for material cooperation to be licit, one must apply the same principles as for indirect voluntary. I believe that is the point of the Italian post. However, I am confused as to how double effect could be applied retroactively.
When I consult Prümmer's Handbook of Moral Theology, the four criteria he gives for licit indirect voluntary are: "1. the act is good in itself or at least indifferent; 2. its immediate effect is good; 3. the intention of the agent is good ; 4. the agent has a proportionately grave reason for acting."
That is a correct quote from Prümmer's handbook, which the SSPX has always used in its seminars. Those four requirements for the application of the principle of the cause of double effect are on page 46, number 57, volume 1.
On that same page Prümmer says about the first requirement (
"the action is good in itself at least indifferent"): "you must see the purpose of the action or moral object, which is what the action is directed by its own nature and immediately (...) I speak, however, of a
moral but not a
physical object because the same
physical act done by different people can have different
moral objects ". Fr. Prümmer gives this example: "Killing a man is an act whose
physical object is the violent destruction of human life (...) but it can be
morally good (...) or
morally bad".
According to this, it is possible that Fr. Nitoglia, in his text, confuses the
physical object with the
moral object. He says this is the
moral object:
"inoculating a liquid made with aborted fetuses explicitly to package the vaccine", but I think that it rather refers to the
physical object. The
moral object in this case is "inoculating a vaccine", and this object is
morally good. "Inoculating a liquid" would be the
physical object and "made with aborted fetuses explicitly to package the vaccine" would be a morally very relevant circuмstance.
Following Prümmer, the first requirement for the moral principle of the cause of double effect (also called "indirect voluntary" by some moralists) would be fulfilled.
Regarding the second requirement (
its immediate effect is good), Prümmer says that "the bad effect must not be before but after the good one." Example: "you cannot kill the fetus in the womb to save the life of the mother." This requirement is violated by the manufacturer of the vaccine because abortion is a (bad) means of obtaining the (good) vaccine. But it happens in a different way with the one who receives the vaccine, since he does not do evil to achieve good.
There is no doubt about the third requirement (
the intention of the agent is good), since the intention of the person receiving the vaccine is to protect themselves against the disease.
Regarding the fourth requirement (
the agent has a proportionately grave reason for acting) it seems to me that the SSPX may have made a serious mistake in its text, since it is possible that Covid is less dangerous than what is said "officially". This point must be settled by competent Catholic scientists. It may happen, then, that for many people the danger of Covid is not so important as to make material cooperation with the crime of abortion. This cooperation is the bad effect of receiving the vaccine.
The SSPX also did not take into account in its article the serious evil of the
scandal: if Catholics can easily resort to the principle of the cause of double effect to receive the vaccine, there will be an immense scandal because Catholics will appear before the world collaborating with the crime of abortion (not only with the precise abortions made to make the vaccine, but against the crime and sin of abortion itself, with all abortions).
So far my doubts about the text of Fr. Nitoglia.
Archbishop Vigano and others also say that this type of vaccination can never be received, but they do not explain precisely why, even in very serious cases, the principle of the cause of double effect cannot be applied with respect to these vaccines.
The response of the Vatican of the year 2005 says that material cooperation in this is exceptionally possible. I'm not sure. Did this docuмent make Fr. Scott change his mind on this matter?
Those who deny that the principle of the cause of double effect can be applied in this case should say which precise premises of the 2005 docuмent are false. This would be nice so that we can have a final judgment on this difficult question. As I said, i do not yet have a final judgment.