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Recombinant retroviral (re-Rv) and adenoviral (re-Ad) vectors for delivery of two foreign genes were constructed, using the internal ribosomal entry site (IRES) of encephalomyocarditis virus (EMCV) which mediates initiation of cap-independent translation. The first gene encoded the hepatitis B surface antigen (HBsAg) and the second encoded human or murine B7-1 molecule, a cell surface protein which...
In this study, we have determined the limit of protection achievable by immunisation with sub-units of Yersinia pestis against the development of plague in an experimental animal model. Co-immunisation with the purified culture-derived F1 and the recombinant V sub-units afforded a greater level of protection than with either sub-unit alone. The protection given by the combined sub-units was several...
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