Final answer:
The Prevnar 13 vaccine is approved for adults 18 years and older to prevent pneumococcal pneumonia and invasive disease caused by strep pneumoniae strains.
Step-by-step explanation:
The subject of this question is Health. The question is asking about the Prevnar 13 vaccine, which is approved for adults 18 years of age and older for the prevention of pneumococcal pneumonia and invasive disease caused by strep pneumoniae strains.
In recent years, the introduction of the Hib vaccine has made S. pneumoniae the leading cause of meningitis in humans aged 2 months through adulthood.
The answer to the question can be found in the provided information which states that there are two pneumococcal vaccines available: pneumococcal conjugate vaccine (PCV13) and pneumococcal polysaccharide vaccine (PPSV23). These vaccines are generally given to vulnerable populations such as children younger than 2 years and adults older than 65 years.