Flaviviridae is a family of viruses known for their single-stranded RNA genomes. This family includes several important human pathogens, such as the viruses that cause dengue fever, Zika virus, and West Nile virus. These viruses are primarily transmitted to humans through the bites of infected mosquitoes and ticks. Members of the Flaviviridae family are typically enveloped viruses, meaning they have a lipid membrane surrounding their protein coat. They can cause a range of diseases, from mild febrile illnesses to severe conditions like hemorrhagic fever. Understanding these viruses is crucial for developing vaccines and treatments.