Hepatitis A virus and hepatitis E virus: emerging and re-emerging enterically transmitted hepatitis viruses -- History of the discovery of hepatitis A virus -- Enterically transmitted non-A, non-B hepatitis and the discovery of hepatitis E virus -- Classification and genomic diversity of enterically transmitted hepatitis viruses -- Hepatitis A virus genome organization and replication strategy -- Hepatitis A virus codon usage: implications for translation kinetics and capsid folding -- Hepatitis A virus capsid structure -- Hepatitis E virus genome structure and replication strategy -- Evolutionary origins of enteric hepatitis viruses -- Stem-cell derived culture models of hepatitis E virus infection -- Murine models of hepatitis A virus infection-- Small animal models of hepatitis E virus infection -- Nonhuman primate models of hepatitis A virus and hepatitis E virus infections -- Comparative pathology of hepatits A virus and hepatits E virus infection -- Globalization and the changing epidemiology of hepatitis A virus -- Epidemiology and transmission of hepatitis A virus and hepatitis E virus infections in the United states -- Epidemiology of genotype 1 and 2 hepatitis E virus infections -- Transmission and epidemiology of hepatitis E virus genotype 3 and 4 infections -- Natural history, clinical manifestions, and pathogenesis of hepatitis E virus genotype 1 and 2 infections -- Acute and persistent hepatitis E virus genotype 3 and 4 infection: clinical features, pathogenesis, and treatment -- Innate immunity to enteric hepatitis viruses -- Adaptive immune responses in hepatitis A virus and hepatitis E virus infections -- Immunization against hepatitis A -- Immunization against hepatitis E