11 months ago
Last edited at 1:55PM on 1/2/2013
The Orthomyxoviridae 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.The first three genera contain viruses that cause influenza in vertebrates, including birds' 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: Influenzavirus A infects humans, other mammals, and birds, and causes all flu pandemics; Influenzavirus B infects humans and seals; Influenzavirus C infects humans and pigs.
There are HUNDREDS of different viruses and new mutations EVERY year. Just take Influenza A as an example. It comes in many flavors that include H1N1, H1N2, H2N2, H3N1, H3N2, H3N8, H5N1, H5N2, H5N3, H5N8, H5N9, H7N1, H7N2, H7N3, H7N4, H7N7, H9N2, H10N7. There is no end to it, I am afraid....