Figure 1From: Receptor binding specificity of recent human H3N2 influenza virusesHemagglutination titers of recent viruses with chicken and human red blood cells. The viruses were grown in MDCK cells and concentrated by centrifugation to obtain a ratio of HA titer with chicken red cells compared to human red cells. For Mem/31/98, OK/323/03 and OK/369/05 there was still no agglutination of chicken red blood cells. The 2006 viruses were not concentrated. The data are average ± standard deviation of 3 experiments.Back to article page