Pneumococcal vaccines are designed to protect against infections caused by the bacterium Streptococcus pneumoniae. This bacterium can lead to serious illnesses such as pneumonia, meningitis, and bloodstream infections. There are two main types of pneumococcal vaccines: PCV13 (pneumococcal conjugate vaccine) and PPSV23 (pneumococcal polysaccharide vaccine). These vaccines are recommended for certain groups, including young children, older adults, and individuals with specific health conditions. Vaccination helps reduce the risk of severe disease and complications associated with pneumococcal infections, contributing to overall public health.