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Beyond its known adverse effects on T cells, HIV infection has deleterious effects on the B-cell compartment, including a reduction in the total number of CD27+ memory B cells, impaired responses to routine immunizations, and a loss of immunization-derived protective immunity over time. Potent antiretroviral therapy (ART) can reconstitute CD4 T cells, but its effect on the function of the B-cell compartment is unclear.
To determine whether early initiation of ART during childhood improves the response to routine childhood vaccinations, researchers in Europe conducted a cross-sectional study of B-cell responses to measles, tetanus, and pneumococcus vaccines in 70 children (mean age, 13 years) with vertically transmitted HIV infection and 50 a…