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] Other strains of H1N1 are endemic in pigs (swine influenza) and in birds (avian influenza). [2]

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 “swine influenza viruses.” When these viruses infect humans, they are termed “variant” viruses.

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 18, 2024 · Influenza A(H3N2) viruses have formed many separate, genetically different clades in recent years that continue to co-circulate. Influenza B viruses are not divided into subtypes, but instead are further classified into two lineages: B/Yamagata and B/Victoria.

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.

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.

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.

Mar 10, 2023 · It is an influenza virus that causes respiratory infection. The virus can also infect birds and mammals. In bird and other animals, it has mutated into many strains. H3N2 is a subtype of...

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 the United States.

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.