Abstract
Ferrets were infected with recombinant influenza A viruses which possessed either the haemagglutinin or neuraminidase antigens of A/Hong Kong/68 influenza virus. After five weeks the immunity of the animals was challenged by infection with A/HK/68 virus. Immunity to challenge infection was greatest in those ferrets with serum HI antibody to A/HK/68; the presence of NI antibody conferred a measurably lower degree of immunity. A small degree of heterotypic immunity was observed following challenge infection of ferrets previously infected with influenza virus A/PR/8/34, although the surface antigens of this virus are completely different from those of A/HK/68. Experiments in which ferrets were infected with A/HK/68 virus and subsequently challenged with the recombinant viruses confirmed the results of the first experiment.
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McLaren, C., Potter, C.W. & Jennings, R. Immunity to influenza in ferrets. Med Microbiol Immunol 160, 33–45 (1974). https://doi.org/10.1007/BF02124341
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DOI: https://doi.org/10.1007/BF02124341