My Friend Has Pneumonoccal Meningistis He Was Induced Into A

my friend has pneumonoccal meningistis he was induced into a coma Monday 30th march they took him of sadation every morning just to see for response no response he was properly took of sadation this morning and still no response he coughs and frowns and that's it does that mean his brain is functioning the doctor said today this is not a good sign no response he is breating for himself that's it how long does it take to come round on his own before that class him as a vegative state