To round out the name, the viruses are given an H and N number to indicate a subtype. A full name might then look like this: ...

We've all heard of "the flu" but when it comes to types, subtypes and variants, influenza can get a bit complicated. According to the U.S. Centers for Disease Control and Prevention (CDC), nearly ...

of bird flu. Researchers know of six subtypes of avian influenza A viruses that have caused human infections: H3 strains. This subtype affects many water birds around the world. In birds it ...

Novel vaccine platform improved protection against diverse influenza subtypes when tested in animal models and human ...

In the case of influenza type A, it is classified into multiple subtypes or strains according to two proteins on the surface of the virus. These subtypes are composed of a letter H and a number ...

The first severe case of H5N1 bird flu was confirmed in Louisiana. Here is a map of other states that have been affected.

The virus primarily infects birds There are multiple subtypes of the bird flu, but H5 subtypes of influenza A are the most common. The two most common types of avian influenza are the following ...