There are two types of pneumococcal vaccines for Strep pneumoniae.
The pneumococcal conjugate vaccine (PCV13) is given to children under 5. It is also given to adults age >=65 who are immunocompromised (PPSV23 is also given afterwards).
The polysaccharide vaccine PPSV23 is given to adults, the indications for which I won't go into.
Since this patient is 2-years old he should have received the conjugate vaccine per CDC guidelines.
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