Abstract
The effectiveness of vaccines and immunization in the prevention of infectious diseases is one of the greatest successes in medicine. In recent years, with access to cutting edge genomic and proteomic technology, it is possible to accelerate the development of new and improved vaccines with better immunogenicity and safety characteristics. Since the first report almost two decades ago, where it was demonstrated that gene expression is possible by directed injection of naked DNA, DNA vaccines have been proven to induce protective immune responses against parasites, virus and bacterium in diverse animal disease models. This review aims to present an overview about DNA vaccines and the mechanisms by which immune responses are induced after immunization with plasmid DNA-encoded antigens.
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