I don't know this is not more widespread, but you have 3 type of care. Non-intrusive ventilators or oxygen masks (or the nasal oxygen stuff), instrusive ventila

I don't know this is not more widespread, but you have 3 type of care. Non-intrusive ventilators or oxygen masks (or the nasal oxygen stuff), instrusive ventilator and the last one is artificial blood oxygenation, i will count this as intrusive ventilation as it is often used with intrusive ventilation. Around 10% of known cases needs hospitalisation. Among them, 70% to 80% of cases only needs oxygen and not respiratory help. So you can't give them oxygen, they'll either die or have permanent right heart or brain damage. Those will likely be fine after a dozen day at the hospital. If your oxygen levels are really, really low, you will need an intrusive ventilator. And yes, the death rate in those cases is absurdly high (between 60 and 90%). Note: 10% of known cases is NOT 10% of cases. Note 2: IMO this 10% number should be way higher as hypoxemia is far more widespread than previously thought, even for people with mild symptoms, even for kids (i only have anecdotal data on this so don't use it as an argument until papers are written and consensus is made). Still, if you have covid with only mild symptoms, please go to the hospital to take your oxygen saturation level.