Do Human Challenge Trials Really Work?

Cobe: Why not do human challenge trials? Dr Slae says they wouldn't be any good because you can only include people in those trials who aren't really at risk of being hurt for covet. He adds that i want to do it on the sickest people, even if there is a real chance that they'll die from it. 'i'm always surprised at how pervasive and how deep the ideas in medical ethics are'