[tormeh]

Should be done outside the normal blood donor system. There's not that much donor blood around, so it would be unethical to use it. Not a practical problem, but it would look and feel bad.

Anyway, yes, why not try this on humans? Sounds perfectly reasonable.

[owenversteeg]

Well, many people seem to be suggesting (including the researchers themselves) that there is a possibility of the older person dying of insta-cancer after receiving the blood because their cancerous stem cells would immediately be told to start multiplying. That's why I think it's a good idea to test this in animals first.

[ars]

> There's not that much donor blood around, so it would be unethical to use it.

Lots of donated blood expires and is tossed. Make a program that all blood about to expire (1 day away) can be used for this.

[sinaa]

Because of cancer.

As mentioned in the article:

"Waking up stem cells might lead to their multiplying uncontrollably."

[phazmatis]

Scientists discover some weird thing they didn't expect, and start spitballing about what the pros/cons could be when reporters show up. News at 11.