Any arbovirus of the genus Flavivirus, many of which are transmitted by ticks or mosquitos(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "flavivirus" in a sentence
"Infection with the dengue flavivirus, which is related to West Nile Virus and Yellow Fever, annually results in an estimated half a million hospitalisations and 22,000 deaths, mostly among infants, according to WHO."
"My abiding interest in infectious disease caused me to focus on the tickborne flavivirus, louping-ill virus, which was then regarded as problematic because of concerns about the safety of the vaccine, first developed at the Moredun many years previously."
"The cause: The disease is caused by the yellow fever virus, which belongs to the flavivirus group."