Catani and colleagues provide data on antigenic properties of neuraminidase proteins of pandemic H1N1 and show that antigenic diversity of the neuraminidase from 2009 to 2020 largely falls into two ...

Two surface proteins, HA and NA, determine the antigenic properties of influenza virus strains. In 1958, a new strain of influenza A with different HA and NA was identified and antigenic shift was ...

The recommendations were made following a meeting that included experts from the FDA, the Centers for Disease Control and Prevention, and the Department of Defense.

H5N1 influenza is evolving rapidly, weakening the effectiveness of existing antibodies and increasing its potential threat to ...

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

Colored scanning electron micrograph (SEM) of H1N1 influenza (flu) virus particle isolated from a lung cell. Moreover, this flu season most closely resembles the 2019-2020 season, which saw peaks ...

To maintain vaccine efficacy, WHO regularly updates influenza vaccine strains based on global epidemiological, virological, ...

This season's influenza vaccine may have been a poor match to a strain of the flu virus that caused many infections this winter, early data released by the Centers for Disease Control and ...

Two surface proteins, HA and NA, determine the antigenic properties of influenza virus strains. In 1958, a new strain of influenza A with different HA and NA was identified and antigenic shift was ...