The pneumococcal vaccine is directed against the

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The pneumococcal vaccine is directed against the capsule, which is the outer layer of Streptococcus pneumoniae bacteria. The capsule plays a key role in the ability of the bacteria to evade the immune system and cause disease. By targeting the capsule, the vaccine helps the immune system recognize and fight the bacteria. The vaccine does not target flagella, pili, or cilia, which are structures that help bacteria move or attach to surfaces.

The Pneumococcal Vaccine Is Directed Against the