Simplify the following text for a Grade 10 native English-speaking person.
Original: In bacterial meningitis , most patients die without treatment , whereas in viral meningitis most patients get better on their own .
Simplified: With treatment , mortality ( risk of death ) from bacterial meningitis depends on the age of the patient and the underlying cause . Of the newborn patients , 20 â `` 30 % may die from an episode of bacterial meningitis .