in 2016, distinct from the previously-known Influenzavirus C genus; before then, Influenza D virus was thought to be a subtype of Influenza C virus.

Cases of infections from the Type D virus are rare compared to Types A, B, and C. Similar to Type C, Type D has seven RNA segments and encodes nine proteins, while Types A and B have eight RNA segments and encode at least 10 proteins.

Influenza D virus

The influenza viruses are members of the family Orthomyxoviridae. Influenza viruses

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