"first do no harm" is closing your eyes and acting as if you don't know those 5 people are going to die, because you don't want to face the risk you'll kill 1.

"first do no harm" is closing your eyes and acting as if you don't know those 5 people are going to die, because you don't want to face the risk you'll kill 1. And in terms of life-years saved, the expectation is much better than that for medicine.