Influenza A virus subtype H3N2 (A/H3N2) is a subtype of influenza A virus (IAV). Some human-adapted strains of A/H3N2 are endemic in humans and are one cause of seasonal influenza (flu). [1]

Mar 28, 2025 · What Is the H3N2 Flu Virus? H3N2 virus is a non-human influenza virus that normally circulates in pigs but can infect people. Viruses that normally circulate in pigs are “ …

May 28, 2021 · H3N2 is a strain of influenza A. It can have a more severe impact than other flu strains. Learn about recent outbreaks, outlook, prevention, and more.

Sep 13, 2023 · What is the H3N2 flu? Read on to learn more about this strain of flu, including previous outbreaks, symptoms, treatment options, and prevention tips.

Apr 2, 2025 · Tests of the influenza A/H3N2 strains, which are now included in the recommended components for the 2025-26 season, appear to recognize the majority of circulating influenza A/H3N2 well, which prompted the panel to support the shift to their inclusion.

Nov 24, 2023 · Influenza A virus subtype H3N2, commonly known as “H3N2 flu,” is a subtype of the Influenza A virus, often implicated in seasonal flu outbreaks. This article aims to provide comprehensive insights into H3N2, its characteristics, impact, and management strategies.

Mar 14, 2023 · H3N2 is a dangerous variant of swine flu. Experts explain signs, symptoms, treatment options, and prevention for H3N2. Plus, if the flu vaccine protects against it.

H3N2 influenza viruses pre-dominated during 3 of the last 5 quite severe influenza seasons. During the 2016/2017 flu season, the H3N2 component of the influenza vaccine exhibited a poor protective efficacy (∼28–42%) against preventing infection of co-circulating strains.

Feb 5, 2021 · This is the first influenza A (H3N2)v virus identified in the United States in 2021. Since 2005, a total of 485 influenza variant virus human infections caused by all subtypes including 437 human infections with A (H3N2)v, including this one, have been reported in …

H3N2 influenza viruses pre-dominated during 3 of the last 5 quite severe influenza seasons. During the 2016/2017 flu season, the H3N2 component of the influenza vaccine exhibited a poor protective efficacy (∼28-42%) against preventing infection of co-circulating strains.