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DNA plasmids and recombinant adenovirus serotype-5 (rAd5) vectors are being studied in human clinical trials as HIV-1 vaccine candidates. Each elicits robust T-cell responses and modest antibody levels. Since protein immunization alone elicits antibody but not CD8 T-cell responses, we studied protein boosting of DNA and rAd5 HIV-1 vaccine vectors. A single Env protein immunization provided a marked...
To understand the cross-reactivity of antibodies directed against variable regions of human immunodeficiency virus-1 (HIV-1) envelope (Env), chimeric immunogens were prepared from different clades with modifications in variable regions, and the resulting neutralizing antibody response was evaluated. The V3-specific neutralization activity induced by a clade B immunogen was limited to clade B viruses...
Influenza epidemic and pandemic strains cannot be predicted with certainty. Current vaccines elicit antibodies effective against specific strains, but new strategies are urgently needed for protection against unexpected strains. DNA vaccines encoding conserved antigens protect animals against diverse subtypes, but their potency needs improvement. We tested DNA prime-recombinant adenoviral boost immunization...
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