NA has been shown to elicit neutralizing and ... of circulating strains within the four circulating subtypes: influenza A virus subtypes H3N2 and H1N1, and influenza B virus subtypes Yamagata ...

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 ...

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 ...

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 ...

To maintain vaccine efficacy, WHO regularly updates influenza vaccine strains based on global epidemiological, virological, and serological analyses. On February 28, 2025, WHO announced the ...

Influenza is one of the most unpredictable of diseases. Each year, the virus mutates slightly in a process called antigenic drift. The greater the mutation, the less likely that your immune system ...

Citation: Influenza vaccine offers moderate protection against influenza A virus strains in EU, according to early estimates (2025, February 27) retrieved 25 March 2025 from https://medicalxpress ...

Zydus Lifesciences on Wednesday (February 26, 2025) said it is introducing a vaccine for protection against new strain of influenza virus. “The company is introducing country’s first flu ...

Objective To examine the association of leisure-time physical activity with mortality from influenza and pneumonia. Methods A nationally representative sample of US adults (aged ≥18 years) who ...

an unprecedented outbreak of highly pathogenic avian influenza (HPAI) H5N1 has been detected in the Chhindwara district, Madhya Pradesh, India. The virus spread marks the first documented instance ...