Influenzavirus C
（重定向自Influenza C virus）
Influenza virus C is a genus in the virus family Orthomyxoviridae, which includes those viruses which cause influenza.
The species in this genus is called Influenza C virus. Influenza C viruses are known to infect humans and pigs.
Flu due to the type C species is rare compared to types A or B, but can be severe and can cause local epidemics. Subtype C has 7 RNA segments and encodes 9 proteins, while types A and B have 8 RNA segments and encode at least 10 proteins.