Contents:

Antigenic Determinants on the Hemagglutinin Subunits of Influenza A Viruses and their Role in Immunity.- The Deliniation of Antigenic Determinants of the Hemagglutinin of Influenza A Viruses by Means of Monoclonal Antibodies.- Antigenic, Adaptive and Adsorptive Variants of the Influenza A Hemagglutinin.- The Hemagglutinin Gene of Influenza Viruses.- Genetic Relatedness of the RNA Segments Coding for the Hemagglutinin of Different Influenza Strains.- Activation of Influenza Infectivity by Proteolytic Cleavage of the Hemagglutinin.- The Structure and Biosynthesis of the Carbohydrate Moiety of the Influenza Virus Hemagglutinin.- Interaction of Influenza Virions with Receptors on Host Cells and on Erythrocytes.- Electron Microscopy of Antibodies Bound to Isolated Influenza Hemagglutinin.- Studies on the Structure of the Hemagglutinin.- Preliminary Studies of the Membrane-Associated Portion of the Hemagglutinin.- 'N- Terminal Amino Acid Analysis of Hemagglutinin Molecules from Duck and Equine Influenza Viruses Previously Implicated as Progenitors of the Hong Kong Strain of Human Influenza.- The Chemistry of Antigenic Variation in Influenza A Virus Hemagglutinin.- Structural Studies on the Hemagglutinin of the Asian Influenza Virus Japan/305/57 - Bellamy/42 (H2N1). Cyanogen Bromide Cleavage of the Larger Polypeptide Chain HA1.- The Structure of the Small Polypeptide Chain of the Hemagglutinin of an Asian Influenza Virus Japan/305/57 - Bellamy/42 (H2N1).- Studies on the Primary Structure of the Hemagglutinin from an H3N2 Variant A/Memphis/102/72.- Chromatographic Separation and Structural Analysis of Heq 1 Hemagglutinin.- The Purification and Structural Characterization of the Fusion Factor of Sendai Virus.- The Chemistry of Antigenic Determinants on Protein Molecules.- List of Participants.- List of Authors.