is the name of any infection caused by bacteria
called Streptococcus pneumoniae or
pneumococcus. 1

Pneumococcal disease

This bacteria can cause many types of illnesses. Some of
these illnesses can be life threatening. 1

You have probably heard of pneumonia,
which is an infection of the lungs. Many different bacteria,
viruses, and even fungi can cause pneumonia. Pneumococcus
is one of the most common causes of severe pneumonia.