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Specific antibody deficiency (SAD) to unconjugated pneumococcal vaccine (PPV) is an established primary B cell immunodeficiency. The occurrence and natural history of SAD in children is unclear. We conducted an observational study to identify SAD in children with recurrent respiratory infections. Ninety‐nine children, mean age 5·9 (range 2–16) years, with recurrent or severe infections were vaccinated...
Quantitation of specific IgG to polysaccharides (serotypes) of Streptococcus pneumoniae provides the basis for evaluating vaccine efficacy. Different enzyme-linked immunosorbent assay (ELISA) methods are used internationally, making comparisons between laboratories difficult. We undertook an inter-laboratory comparison between two international laboratories performing serotype-specific IgG ELISAs...
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