Are you awake?
SLEEPING SICKNESS
"The disease attacks the brain, leaving some victims in a statue-like condition, speechless and motionless.[4] Between 1915 and 1926,[5] an epidemic of encephalitis lethargica spread around the world. Nearly five million people were affected, a third of whom died in the acute stages. Many of those who survived never returned to their pre-existing "aliveness".
They would be conscious and aware – yet not fully awake; they would sit motionless and speechless all day in their chairs, totally lacking energy, impetus, initiative, motive, appetite, affect or desire; they registered what went on about them without active attention, and with profound indifference. They neither conveyed nor felt the feeling of life; they were as insubstantial as ghosts, and as passive as zombies.[6]"
https://en.wikipedia.org/wiki/Encephalitis_lethargica