Doctors says former F1 driver "critical", cannot predict outcome

The transcript provides an update on Michael Schumacher's condition following a ski accident in Meribel. He was admitted to the Grenoble hospital with a severe head injury and is in a critical state. Schumacher is in an artificial coma, and his prognosis remains uncertain despite all current treatments being applied.

What is the current status of Michael Schumacher's condition as mentioned in the text?

What uncertainty is expressed regarding Michael Schumacher's future?