Diseases, Conditions, Syndromes

What to expect for the flu, RSV and COVID-19 respiratory season

Influenza, respiratory syncytial virus (RSV), and COVID-19 are all part of the seasonal respiratory virus lineup. According to the Centers for Disease Control and Prevention (CDC), the upcoming fall and winter are expected ...

Diseases, Conditions, Syndromes

Researcher helps boost immune system memory against influenza

When humans or animals get infected, the body's immune system tries to not only clear the infection but also build up a memory of the pathogen that caused it. So, when the pathogen comes around again for possible reinfection, ...

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Orthomyxoviridae

Influenzavirus A Influenzavirus B Influenzavirus C Isavirus Thogotovirus

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. The first three genera contain viruses that cause influenza in vertebrates, including birds (see also avian influenza), humans, and other mammals. Isaviruses infect salmon; thogotoviruses infect vertebrates and invertebrates, such as mosquitoes and sea lice.

The three genera of Influenzavirus, which are identified by antigenic differences in their nucleoprotein and matrix protein infect vertebrates as follows:

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