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https://www.selleckchem.com/products/OSI-906.html BACKGROUND Given the increasing incidence of measles, the aim was to assess the seroprevalence of measles immunity among employees of a Czech tertiary care hospital and to assess their willingness to revaccination. METHODS 3027 hospital employees (2421 females, 606 males) underwent a serological analysis of their measles antibody levels with an option of revaccination in case of an insufficient level. RESULTS The median age of participants was 42 years. Seropositivity was noted in 54% of the participants, with the antibody values higher in the oldest study participants and with a decrease around the birth year 1968. Logistic regression analysis confirmed a significant relationship of seropositivity with age (odds ratio 0.97, p less then 0.005). Out of the seronegative, 80.9% individuals got revaccinated. CONCLUSIONS 46% of the participants did not reach a sufficient antibody level set by the assay's manufacturer. Although the routine vaccination system is well established it may be ineffective. INTRODUCTION CD4+ T cells are essential for inducing optimal CD8+ T cell and antibody-producing B cell responses and maintaining their long-term immunological memory. Therefore, CD4+ T cells are a critical component in HIV vaccine development. Due to enormous viral gene variation and significant human host genetic diversity, HIV vaccines may need to be custom-made for different countries. METHODS Previously, we designed a CD4+ T cell vaccine based on Chinese HIV isolates and HLA-DR alleles using bioinformatics tools and predicted that 20 epitopes could cover 98.1% of the Chinese population. In vivo testing of the poly-epitope antigen in mice only activated specific T cells for some epitopes. To elucidate the mechanism of the observed differential immunogenicity, we examined poly-epitope antigen processing and presentation using in vitro and in vivo analytical methods. RESULTS Enzymatic digestion indicated that all 20 epitopes

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