it is a painful decision to do experiments on animals.

In the question of doing experiments on animal to save human lives, I think it is too complicated to think about ethically by looking for an yes or no answer. I think the appropriate approach is to discuss what are the values that we respect regarding this issue and consider it as ultimate values and try to reach it. It is for sure a respectable value to save a human being. And it is also respectable value to save animals from any kind of pain. So let us do experiments on animals for now but in the same time we should improve laps and computers experiments.