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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]
Flu was most intense in the South, Southwest and western states. ... most illnesses — a Type A H1N1 and a Type A H3N2. Health officials are closely watching a third strain — a bird flu known ...
Vaccine makers choose one variant of type A H1N1, a variant of H3N2 and a B flu strain from a particular lineage, the CDC explains. Previously, they also included a B strain from another lineage ...
Flu A and flu B are the most common strains of the flu that circulate in humans. The U.S. is currently in the middle of flu season, with a high number of cases reported across the country. There ...
The novel H3N2 strain emerged in Hong Kong and spread worldwide, causing the Hong Kong flu pandemic, which resulted in 500,000–2,000,000 deaths. This was the first pandemic to spread significantly by air travel. [3] [34] H2N2 and H3N2 co-circulated after the pandemic until 1971 when H2N2 waned in prevalence and was completely replaced by H3N2 ...
The H3N2 pandemic flu strain contained genes from a low-pathogenicity avian influenza virus. [7] Specifically, it had acquired a new hemagglutinin gene and a new PB1 gene, while it preserved the neuraminidase and five other genes from the preexisting human H2N2 strain. The new hemagglutinin helped H3N2 evade preexisting immunity in humans.
Flu A strains — which could cause more severe symptoms — make up nearly all cases going around right now, particularly H1N1 and H3N2. There were no new human cases of bird flu detected in the ...
Also, the H3N2 strain, according to the CDC, affects elderly and young children more than other strains, resulting in more severe hospitalizations and deaths. [26] The Atlantic also noted that the 2017 vaccine for the flu was only ten percent effective against H3N2 in Australia. As the typical practice of studying and creating the current ...