The California duck farm's strain of H5N9 is different from those earlier cases because this time it is closely related to a ...

Flu A and flu B are two different strains of influenza, explains Thomas Russo, M.D., professor and chief of infectious ...

The winter flu season features two types of influenza. Here's what you need to know about them and how they differ.

Nearly 119,000 birds have been culled at a farm in California after a bird flu called H5N9 was detected among the poultry ...

A new strain of bird flu has been detected on a duck farm in California. The World Organisation for Animal Health reported ...

The H (sometimes HA), is hemagglutinin, a lollipop-shaped protein that binds to a receptor on a human cell, the first step toward getting the virus inside the cell. The N is neuraminidase, a second ...

"The Chinese poultry lineage may have experienced more vaccine-driven selection compared to other lineages," the researchers ...

A new strain of H5N9 bird flu was detected at a commercial duck operation in California's Merced County. All the ducks were ...

Specifically, there are 18 possible types of a protein called hemagglutinin (H) and 11 types of neuraminidase (N); influenza subtypes are labeled depending on which of these proteins are present.

Moreover, because at least 16 different hemagglutinin subtypes and nine different neuraminidase subtypes have been characterized, many different combinations of capsid proteins are possible.

Subsequent work has described different versions of the virus surface proteins haemagglutinin (HA) and neuraminidase (NA). Different combinations of these give rise to the influenza A virus subtypes, ...

Am J Health Syst Pharm. 2007;64(2):149-165. Antigenic alterations occur frequently in influenza hemagglutinin and neuraminidase antigenic sites and are the mechanism for virus adaptation to the ...