Nucleic acids are being extensively investigated for use in gene therapy and in genetic vaccinations in which foreign nucleic acid is translated into proteins by the host cells. Vaccines based on DNA and messenger RNA (mRNA) are able to stimulate all effectors of the adaptive immune response: B lymphocytes, cytotoxic T cells, and T helper cells. This makes them a useful tool in the creation of prophylactic vaccines for infectious diseases and for cancer immunotherapy.
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