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We sought to determine susceptibility to highly pathogenic avian influenza (HPAI) H5N1 virus and to explore immune protection of inactivated H5N1 vaccine in streptozotocin-induced type 1 diabetic mice. Susceptibility of diabetic mice to an H5N1 virus was evaluated by comparing the median lethal dose (LD 50 ) and the lung virus titers with those of the healthy after the viral infection. To...
The highly pathogenic H5N1 influenza viruses are one of candidates for the next pandemic. Information on protective immunity for pregnant animals by vaccination against the H5N1 influenza virus is limited. Here, we show that the immunization of pregnant mice with inactivated H5N1 influenza vaccine protects them, their fetuses, and their infant mice from H5N1 influenza viruses. Pregnant mice immunized...
Several felid species have been shown to be susceptible to infection with highly pathogenic avian influenza (HPAI) viruses of the H5N1 subtype. Infection of felids by H5N1 HPAI virus is often fatal, and cat-to-cat transmission has been documented. Domestic cats may then be involved in the transmission of infection to other animals but also to humans. A particular concern is the hypothetical role of...
Highly pathogenic avian influenza A virus H5N1 has the potential to cause a pandemic. Many prototype pandemic influenza A (H5N1) vaccines had been developed and well evaluated in adults in recent years. However, data in children are limited. Herein we evaluate the safety and immunogenicity of adjuvanted split-virion and whole-virion H5N1 vaccines in children.An open-labelled phase I trial was conducted...
A non-egg, non-culture based influenza vaccine that intervenes large influenza outbreaks and protects against heterosubtypic infections is needed. Candidates of such vaccine are likely to be conserved influenza virus proteins or their coding DNA. The vaccine must be conveniently produced at reasonable cost, safe, highly immunogenic and should be able to recall rapidly the immunological memory upon...
Baculovirus (BV) replicating in insect cells can express a foreign gene product as part of its genome. The influenza hemagglutinin (HA) can be expressed from BV and displayed on the surface of baculovirus (HA-DBV). In this study we first generated six recombinant baculoviruses that expressed chimeric HAs with segments of the BV glycoprotein (gp64). The signal peptide (SP) and cytoplasmic tail (CT)...
Our previous studies have shown the adjuvanticity of an Onchocerca volvulus recombinant protein, Ov-ASP-1 (ASP-1), when administered in an aqueous formulation with bystander vaccine antigens or commercial vaccines. In this study, we reported a novel formulation that took advantage of the protein nature of the ASP-1 adjuvant by creating recombinant fusion protein vaccines linking the highly conserved...
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