Bunyamwera orthobunyavirus (BUNV) is a negative-sense, single-stranded enveloped RNA virus.

Bunyamwera orthobunyavirus can infect both humans and Aedes aegypti (yellow fever mosquito).

[3] It is named for Bunyamwera, a town in western Uganda, where it was isolated in 1943.

[4][5][6] The genetic structure of Bunyamwera orthobunyavirus is typical for Bunyavirales viruses, which are an order of enveloped negative-sense, single-stranded RNA viruses with a genome split into three parts—Small (S), Middle (M), and Large (L).

[7] The genomic RNA segments are encapsidated by copies of the N protein in the form of ribonucleoprotein (RNP) complexes.