If we were in the middle of another siege, we'd have to weigh the pros and cons of doing so.

[Clearly. He's a realist, he knows not everyone can be saved every time. But if there are enough healthy people capable of fighting, and can risk one sitting out the action for a while, he's perfectly willing.]

If your artificial blood stores better than the real thing, maybe prioritize setting it aside for emergencies. Use ours first when the situation isn't as critical.