Sure, no worries. I am happy to answer questions.
This is a complex question. Some things are clear, some are less so. Basically in the Christian Greek scriptures I believe this is only mentioned once: https://www.jw.org/en/publications/bible/study-bible/books/a...
Here is more info: https://www.jw.org/en/bible-teachings/questions/bible-about-...
Our feelings are that blood is sacred, and once it leaves the body it should return to the ground. Basically, blood is life, and life belongs to Jehovah.
Cloning blood would be wrong because its misusing something that has specific guidelines around its use. If you could clone the blood without like actually drawing blood from someone for the procedure, I guess that would be OK. This is weird and I am not totally sure.
We would not be OK with storing our own blood for future use, as this would be a kind of usage, and is contrary to the instructions to pour it out. And this would also be considered consumption/not abstaining.
As I think about this, though, it makes me think about using blood in the contexts of blood testing. Hmm.
Anyway I mean the scriptures give some instructions and we are doing our best to extrapolate to other situations. Things aren't always cut and dry. We just do our best to understand.