The pneumococcal vaccine helps protect against infections caused by Streptococcus pneumoniae, a bacterium that can lead to serious illnesses such as pneumonia, meningitis, and bloodstream infections. It works by helping the immune system build antibodies that defend against these harmful bacteria, lowering the risk of severe infection.

Clinical research continues to improve vaccine effectiveness and expand protection, helping safeguard individuals and communities from preventable pneumococcal diseases.