This book is the sixth of a series of books based on ICAAC symposia on emerging infections, and contains chapters on hepatitis C virus and liver disease, re-emergence of poliovirus disease from a polio vaccine virus, yellow fever associated disease, Ebola haemorrhagic fever, the global epidemiology of AIDS, enteroaggregative Escherichia coli, clostridial necrotising fasciitis in injecting drug users in California, unexplained illness in drug …