The egg-white inhibitor of influenza virus hemagglutination. IV. Production of modified (weak) inhibitor by influenza viruses; an interpretation of virus-induced changes in the character of the inhibition curve.
D000371:Agglutination; D006384:Hemagglutination; D006386:Hemagglutination Tests; D009975:Orthomyxoviridae
AGGLUTINATION; INFLUENZA VIRUSES