APEXXNAR is a pneumococcal conjugate vaccine designed to protect individuals from infections caused by the bacterium Streptococcus pneumoniae. This vaccine works by stimulating the body's immune system to produce antibodies against pneumococcal bacteria, thereby providing immunity against various diseases caused by these pathogens, including pneumonia, meningitis, and sepsis, among others. APEXXNAR is typically administered through injections and is recommended for individuals in specific age groups or those with certain health conditions that put them at higher risk for pneumococcal diseases. By promoting a strong immune response, APEXXNAR plays a crucial role in preventing the spread and severity of pneumococcal infections, contributing to public health and safety.