@FrMatthewLC makes the case that for the 'greater good' it's morally licit to receive a vaccine based on cells derived from an abortion 30 years ago.

He cites the letter from 2005 from the Pontifical Academy for Life as justification for taking 1 of these vaccines.

@FrMatthewLC suggests the majority "trained professional Catholic bioethicists and moral theologians" agree with Archbishop Fisher, OP that these are morally licit to take.

So, I have a number of questions for him, but I doubt he'll answer them. I'll posit them anyway.

But first, let me say a couple things.

1. I agree with the Vatican letter that it can, in certain cases be morally licit to receive these vaccines, and;

2. I agree that it can constitute remote material cooperation with evil in some cases, and;

3. I think more generally it is often of the level of mediate material cooperation with evil, and can sometimes be morally acceptable; and,

4. In no way do I accept it is actually PASSIVE remote material cooperation with evil.

With that said,

@FrMatthewLC asserts the majority of "trained professional Catholic bioethicists and moral theologians" agree with Archbishop Fisher's point.

Q: What group constitutes this "majority"? Where do you get this statistic from?

Q: How do you define Catholic bioethicist, and where does the Church define who constitutes a bioethicist?

Q: You cite receiving a vaccine like this is for "the greater good". How do you define the "greater good" in this situation?

Q: If the state is not compelling a person to receive a particular vaccine based on an abortion cell line, & other vaccines are in development that are NOT based on such a cell line, should a Catholic defer receiving it until one is available NOT based on such a cell line?

Q: If a Catholic chooses to receive a vaccine based on an abortion cell line in the absence of state compulsion, what level of cooperation with evil does this constitute? Simple material cooperation or mediate material cooperation?

Since the Shoah is historically much older than this abortion cell line that vaccines are developed from, would it also constitute passive remote material cooperation with evil under state compulsion to receive a vaccine based on the cell line of a Jew murdered in the Shoah?

That last question is important, as I believe the Church EXPLICITLY endorsed the Nuremburg Protocols following the War and endorsed the illegitimacy of recourse to Nazi "medical" research derived from the concentration camps.

I would love to see how @FrMatthewLC makes a moral distinction between the two.

These are ALL legitimate questions, and if he wants to tweet on this, he should at least attempt to answer them.

He has ignored the issue so far.