Improved measurement of influenza virus hemagglutinin titer.
D000906:Antibodies; D003124:Colorimetry; D005780:Gelatin; D006384:Hemagglutination; D066298:In Vitro Techniques; D007700:Kinetics; D009975:Orthomyxoviridae / Q000276:immunology*; D014461:Ultracentrifugation
D000906:Antibodies; D005780:Gelatin