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Prognosis

Bacterial meningitis is fatal in as many as 25% of cases. Patients with meningitis caused by Streptococcus pneumoniae and patients younger than 2 years old or over the age of 60 have a poor prognosis. Prompt medical treatment (i.e., antibiotics) reduces the risk for dying from bacterial meningitis to less than 15%.

Viral meningitis usually resolves in 7–10 days and is fatal in fewer than 1% of cases.
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