The Orthomyxoviridae (orthos, Greek for "straight"; myxa, Greek for "mucus") are a family of RNA viruses that includes five genera: Influenzavirus A, Influenzavirus B, Influenzavirus C, Isavirus and Thogotovirus. A sixth has recently been described.Presti RM, Zhao G, Beatty WL, Mihindukulasuriya KA, Travassos da Rosa AP, Popov VL, Tesh RB, Virgin HW, Wang D(2009) Quaranfil, Johnston Atoll and Lake Chad viruses are novel members of the family Orthomyxoviridae. J Virol. The first three genera con… (More on Orthomyxoviridae)