<p>Part I: Molecular determinants of pathogenicity</p><p> The Hemagglutinin - a Determinant of Pathogenicity</p><p>Eva Böttcher-Friebertshäuser, Wolfgang Garten, Mikhail Matrosovich, and Hans Dieter Klenk</p><p> Molecular determinants of pathogenicity in the polymerase complex</p><p>Gülsah Gabriel and Ervin Fodor</p><p> Part II: Virus entry and cell tropism</p><p> Receptor binding properties of the influenza virus hemagglutinin as a determinant of host range</p><p>Xiaoli Xiong, John W. McCauley, David A. Steinhauer</p><p> Acid-induced membrane fusion by the hemagglutinin protein and its role in influenza virus biology</p><p>Charles J. Russell</p><p>Part III: Transmission and Pandemics</p><p> Pandemic Preparedness and the Influenza Risk Assessment Tool (IRAT)</p><p>Nancy J. Cox, Susan C. Trock and Stephen A. Burke</p><p> Avian influenza virus transmission to mammals</p><p>S. Herfst, M. Imai, Y. Kawaoka and R.A.M. Fouchier</p><p> Transmission in the Guinea Pig Model</p><p>Anice C. Lowen, Nicole M. Bouvier and John Steel</p><p> Enhancement of influenza virus transmission by gene reassortment</p><p>Chengjun Li and Hualan Chen</p><p> Swine and Influenza: A Challenge to One Health Research</p><p>Robert E. Kahn, Wenjun Ma and Jürgen A. Richt</p><p> Part IV: Animal models and pathogenesis</p><p> Influenza Pathobiology and Pathogenesis in Avian Species</p><p>Monique S. Franҫa and Justin D. Brown</p><p> Molecular determinants of influenza virus pathogenesis in mice</p><p>Ram P. Kamal, Jaqueline M. Katz, and Ian A. York</p><p> Mammalian models for the study of H7 virus pathogenesis and transmission</p><p>Jessica A. Belser and Terrence M. Tumpey</p><p> Pathogenesis and vaccination of influenza A virus in swine</p><p>Daniela S. Rajao, Tavis K. Anderson, Phillip C. Gauger, Amy L. Vincent</p><p> Secondary Bacterial Infections in Influenza Virus Infection Pathogenesis</p><p>Amber M. Smith and Jonathan A. McCullers</p><p> </p><p>Part V: Evolution, Antigenic Variation</p><p> Evolution and Ecology of Influenza A viruses</p><p>Sun-Woo Yoon, Richard J. Webby and Robert G. Webster</p><p> Influenza A virus reassortment</p><p>John Steel and Anice C. Lowen</p><p> Antigenic Analyses of Highly Pathogenic Avian Influenza A Viruses</p><p>Ruben O Donis</p>