N-Acetylneuraminyllactosylceramide, GM3-NeuAc, a new influenza A virus receptor which mediates the adsorption-fusion process of viral infection. Binding specificity of influenza virus A/Aichi/2/68 (H3N2) to membrane-associated GM3 with different molecular species of sialic acid. Agglutinates of native chicken erythrocytes caused by influenza virus A/Aichi/2/68 (H3N2) at 4 degrees C were potently fused