My cousine has met a road accident last friday.Now 6 days have passed but he is still in coma.He has got TBI and his GCS has raised from 3 to 6.Othre body parts are ok.Just want to know whether the prognosis is slow or in such cases healing takes time.Big question is that approximately how long may it take further for him to come out of coma.How serious is his condition.What is life expectancy.Thanks