| 摘要 |
An influenza vaccine is disclosed which comprises, as an active ingredient, a neuraminidase antigen which has been isolated from an antigenically functional virus and has substantial cross-reactivity with the influenza virus against which the vaccine is to be effective. The neuraminidase antigen can be derived from a virus antigenically representative of the contemporary or prevalent influenza virus subtype of interest, e.g., H3N2, the Hong Kong variant of influenza.
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