CPR works by blowing out by one person directly into another person, and it can save lives. There's a good amount of unconverted oxygen, nitrogen that was already in the air, and of course some carbon dioxide coming out each breath. But lungs are far from 100% effective, so you're still breathing out a good amount of the oxygen you took into your lungs. It's why CPR works and does save lives despite breathing out directly into another person's lungs.
CPR works by blowing out by one person directly into another person, and it can save lives. There's a good amount of unconverted oxygen, nitrogen that was already in the air, and of course some carbon dioxide coming out each breath. But lungs are far from 100% effective, so you're still breathing out a good amount of the oxygen you took into your lungs. It's why CPR works and does save lives despite breathing out directly into another person's lungs.
Your kidding I hope. Apparently, you don't know the difference between CPR and wearing a mask all day. Please, don't waste my time,