Compare and contrast the PCV13 and PPSV23 Vaccines against pneumococcal infection and their limitations?

In a one-page essay, describe the cause of Pneumococcal infections. Describe what is so important about Pneumococcal pneumonia and how to treat it. What is the problem protecting against 80 different types of pneumococcus from one vaccine? Compare and contrast the PCV13 and PPSV23 Vaccines against pneumococcal infection and their limitations?How is pneumococcal pneumonia the same and different than COVID pneumonia?