We previously described a girl with recurrent episodes of pneumococcal pneumonia with septicemia and other infections,(1) found to have interleukin-1 receptor-associated kinase 4 deficiency (IRAK-4) deficiency.(2) In this report, we show that our patient is unable to sustain antibody responses either to polysaccharide or protein antigens or to a neoantigen-bacteriophage.
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