Over 50 per cent of known flaviviruses have been associated with human disease. The Flavivirus genus constitutes some of the most serious human pathogens including Japanese encephalitis, dengue and yellow fever. Flaviviruses are known for their complex life cycles and epidemic spread, and are considered a globally-emergent viral threat. Structure, Replication and Evolution is the first volume of The Flaviviruses and presents the latest research covering the conceptual advances on aspects such as the characterization of virus structure, cellular receptors, mechanisms of virus entry, host and viral components of the RNA replicase.