Pneumococcal pneumonia is a type of lung infection caused by the bacterium Streptococcus pneumoniae. It can lead to symptoms such as cough, fever, chest pain, and difficulty breathing. This infection is particularly serious for young children, the elderly, and individuals with weakened immune systems. The bacteria can spread through respiratory droplets when an infected person coughs or sneezes. Vaccines are available to help prevent pneumococcal pneumonia, making them important for at-risk populations. Early diagnosis and treatment with antibiotics are crucial for recovery and to prevent complications.