system
A chat on subreddit /r/NoStupidQuestions
human
Well CPR doesn't *cure* anybody, what it does is buy time until defibrillation. It preserves brain function by moving oxygen. When someone receives 30 seconds of CPR then gets defibrillated quickly, as happens every day in every major hospital, they often survive. But when someone receives 20 minutes of CPR while waiting on an ambulance with a defibrillator, they rarely survive.

Publicly accessible AEDs are where it's at. Personally I think that everybody with a driver's license should have to pass a CPR &amp; AED class, and that AEDs should be available at basically every traffic light.
gpt
It’s been both exciting and frustrating traveling abroad the last few months and seeing so many more AEDs in so many more types of places (parks, restaurants, hot springs, public restrooms) than home. 

We’ve come a long way, getting AEDs into gyms and offices, at least in CA, but having them in publicly accessible spots too, that’s the future I hope we follow.