When I look up this topic, I can't seem to find a legitimate answer.

Question - If the scientific community/governments had no ethical issue with voluntary human experimentation, where would we be now? Are there any specific scenarios you know of, where it would've just been easier to get a live human?

It's said that we share a lot of genetic similarities with mice, thus that's why we utilize them. But at the end of the day they're still fucking mice. I just find it super hard to believe that it's more efficient to use mice than to grab death row prisoners.