There are four different types of influenza viruses: Influenza A ... For example, the most common influenza A subtypes that go around seasonally in humans are H1N1 and H3N2.

We might have better T cell responses against H1N1 than we thought. New pandemic strains of influenza virus typically are more virulent than those that have been circulating longer, presumably ...

These immune responses conferred broad protection against various influenza A virus subtypes, including human H1N1 and H3N2, and avian H5N1 strains. The second approach to developing next ...

Primers and probes specific for swine influenza A (H1 and H3 subtypes) were recently developed ... with a novel swine-origin influenza A (H1N1) virus have been identified in the United States ...

Pigs are the most important reservoir for influenza A viruses, acting as an intermediary host for both interspecies transmission and genetic reassortment. This is due to the high susceptibility of ...

The diagram shows the important events and processes in the emergence of influenza A (H1N1) viruses during the past 91 years. Avian, swine, and human populations are represented in the top ...

The researchers pretreated mice intranasally with heat-killed DK128 and then infected them with a lethal dose of influenza A virus, subtype H3N2 or H1N1. Mice pretreated with a low dose of DK128 ...

At the same time, recent CDC data shows that seasonal influenza A is rising across the U.S. — specifically the H1N1 ... viruses are a type A influenza virus. "We do need subtype confirmation ...

Influenza A viruses come in many varieties. Four subtypes commonly affect humans, Dr. Lowen said — you may have heard of H1N1, for example. But many more influenza A viruses have been identified ...

But the 2018/2019 flu season was an anomaly, in that both subtypes, H1N1 and H3N2, took hold at different points in the season. For influenza researchers at McMaster University, this presented a ...

Influenza A is divided into subtypes based on two proteins on the virus's surface: hemagglutinin and neuraminidase. These lead to different combinations—with H1N1 and H3N2 presently the most ...