I agree, here is a link covering the 3 biggest studies on people put on ventilators, the two both had around 33% recovery, and the other 14%. Those are the rough estimate numbers to beat and I believe many of these patients were given experimental treatments.

https://www.npr.org/sections/health-shots/202...9-patients

The largest study so far to look at mortality among coronavirus patients on ventilators was done by the Intensive Care National Audit & Research Centre in London. It found that among 98 ventilated patients in the U.K., just 33 were discharged alive.

The numbers from a study of Wuhan, China, are even grimmer. Only 3 of 22 ventilated patients survived.

And a study of 18 ventilated patients in Washington state found that nine were still alive when the study ended, but only six had recovered enough to breathe on their own.

All the early research suggests that once coronavirus patients are placed on a ventilator, they will probably need to stay on it for weeks. And the longer patients remain on a breathing machine, the more likely they are to die.