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Pneumococcal Disease

Do the vaccines work?

There are two vaccines for pneumococcal disease used in the US. Both are effective and safe. In adults age 65 years and older, pneumococcal vaccination has been shown to reduce the risk of pneumonia caused by the types included in the vaccine by 45 percent and the risk of meningitis and bloodstream infection by 75 percent. In young children, widespread immunization against pneumococcal disease has reduced cases by more than 99 percent in children and has also led to fewer infections in other age groups.