Weijers, T.F.

strain antisera virus antibody antibody preparations reference strains influenza netherland panel reference preparation hi tests unadsorbed value difference antigenic method /bangkok hi assays study computer titer cluster distance table program coefficient cross-adsorbed webster euclidean euclidean distance coefficient computer program dendrogram /bangkok l /79 erasmus university osterhau assay virus strains h 3n virus calculation discriminative number comparison pattern poliovirus strains discriminative power kendal antigenic determinants procedure antibody preparation reference strain heterologou spread van steenis egg-grown virus /england hi test influenza virus dilution 24 strains hybridoma /texa university table 1 heterologous strains fluid production antigenic drift pdp 1170 computer sucrose gradientpurified virus reactivity surveillance gerhard health chlamydial washington reaction hi titer pattern kinds relationships cluster relatedness numbers influenza studies ferre t antisera