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<https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2842940> dc:abstract "We previously used human parainfluenza virus type 3 (HPIV3) as a vector to express the Ebola virus (EBOV) GP glycoprotein. The resulting HPIV3/EboGP vaccine was immunogenic and protective against EBOV challenge in a non-human primate model. However it remained unclear whether the vaccine would be effective in adults due to pre-existing immunity to HPIV3. Here, the immunogenicity of HPIV3/EboGP was compared in HPIV3-naïve and HPIV3-immune Rhesus monkeys. After a single dose of HPIV3/EboGP, the titers of EBOV-specific serum ELISA or neutralization antibodies were substantially less in HPIV3-immune animals compared to HPIV3-naïve animals. However, after two doses, which were previously determined to be required for complete protection against EBOV challenge, the antibody titers were indistinguishable between the two groups. The vaccine virus appeared to replicate, at a reduced level, in the respiratory tract despite the pre-existing immunity. This may reflect the known ability of HPIV3 to re-infect, and may also reflect the presence of EBOV GP in the vector virion, which confers resistance to neutralization in vitro by HPIV3-specific antibodies. These data suggest that HPIV3/EboGP will be immunogenic in adults as well as children." ;
    dc:creator "['Bukreyev, Alexander A.', 'DiNapoli, Joshua M.', 'Yang, Lijuan', 'Murphy, Brian R.', 'Collins, Peter L.']" ;
    dc:identifier <http://dx.doi.org/10.1016/j.virol.2010.01.015>,
        <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2842940> ;
    dc:title "Mucosal parainfluenza virus-vectored vaccine against Ebola virus replicates in the respiratory tract of vector-immune monkeys and is immunogenic" ;
    sso:source_x "PMC" .