The Nurse Is Administering a Pneumococcal Vaccine to an Older

The nurse is administering a pneumococcal vaccine to an older patient. What is the rationale for this vaccine?

A) There is a decline in effectiveness of lung defense mechanisms.
B) Many older adults are exposed to more pathogens as they age.
C) Many older adults develop immunity to viral pneumonia, not bacterial.
D) Many older adults become residents in extended-care facilities (ECFs) .