Flaviviruses

The flaviviruses are a family of positive, single-stranded, enveloped RNA viruses that cause widespread morbidity and mortality throughout the world. Some of the mosquito-transmitted viruses include yellow fever, dengue fever, Japanese encephalitis, West Nile viruses and Zika virus. Zika has spread to 25 countries and territories since 2015. Today, severe dengue affects most Asian and Latin American countries and has become a leading cause of hospitalization and death among children and adults in these regions.