Conjugate and polysaccharide pneumococcal vaccines do not improve initial response of the polysaccharide vaccine in HIV-infected adults

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This is a randomized trial to compare the immunoglobulin G response and the antibody avidity after two pneumococcal vaccinations, conjugated pneumococcal vaccine (CPV) and polysaccharide pneumococcal vaccine (PPV) 4 weeks after vs. PPV alone in 202 HIV-infected adults. There were no differences in the two strategies, either in the percentage of immunoglobulin G two-fold increase for the CPV included serotypes or immunoglobulin G two-fold increase, reaching the level of 1 μg/ml except for serotype 23F (26% responded after conjugated pneumococcal vaccine + PPV vs. 14% after PPV). No avidity increases were seen in any strategy.

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