Abstract
The cellular immunity of current influenza split vaccine is relatively low. It is necessary to develop a novel vaccine to improve the cellular immunity. The authors of this study prepared liposome-encapsulated influenza split vaccine and tested it in BALB/c mice. The mice were immunized once with 4 μg of haemagglutinin of monovalent A/New Caledonia/20/99 (H1N1) encapsulated with liposomes or the split virus vaccine only through intrastomach injection. In a comparative study, it was observed that the liposome-encapsulated vaccine elicited a higher neutralizing antibody response, more effectively stimulated spleen cell proliferation, increased cell subsets like CD4 + and CD4 + /CD8 + , and triggered IL-4 and IFN-γ production.
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