Can't a person after being affected by meningitis come to normal state ?

Depends on variables: Many forms of viral meningitis produce little or no long term injury.They usually return to the same functional level. Bacterial menengitis may or may not produce permanent problems depending on the germ, how soon it was detected and how well it responds to treatment. Germs like tuberculosis can be very destructive and leave serious long term defects in many cases.