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Current guidelines recommend a combined schedule of a 13-valent pneumococcal conjugate vaccine (PCV13) and PPSV23 (23-valent polysaccharide vaccine) for asplenic individuals. We show that PCV13 induces a T-dependent immune response in asplenic individuals with [beta]-thalassemia, but previous PPSV23s affect the memory B-cell response in a dose- and time-dependent manner.

Clinical Trials Registration. NCT01846923.

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