This is a complex ethical question. I wouldn't say that you would be responsible for the cause of the death. Although in my view, there is a responsibility to help others. So there would be a responsibility held for letting someone die when it could be prevented. But, it makes me wonder if it's reasonable to hold someone else up to my own ethical morals. (Ohio)

Yes. We cannot have community unless we accept some responsibility for each other. (San Francisco, CA)

Not if you can't help them. (Chicago, IL)

Not necessarily - depends on the circumstances. And if you were even partially responsible, how could one judge themselves for it? Think of Beloved (San Francisco, CA)