system
Given the following post, respond as if you're commenting on Reddit:
human
We are on the way to growing human organs, is making human blood feasible in a lab?

If we could make blood in a lab, it wouldn't be potentially a carrier of disease from it's donor.  Also, it would reduce the need for donors if we could just create it.  If we are so close to creating organs that could be used for transplants, could we somehow also make different types of blood?
gpt
Blood products nowadays are practically risk free with respect to infections, so this is not an incentive. Donating blood is amazingly simple and cheap compared to in vitro production. Blood is a complex liquid!