Virosomes were prepared by using the zwitterion detergent sulfobetaine-12. The virosomes included the surface antigens and virus-specific lipids of influenza virus, strain A/PR/8/34. Immunogenic and protective properties of the surface antigens in the micellar form and as a complex with the virosomes were studied. The surface antigens of this complex, like the intact virus, were found to possess the high immunogenic and protective activity in relation to the following infection with the homologous pathogenic virus.
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