Influenza A is believed to be the most severe type of flu virus for humans, although this is the subject of debate, as there is some evidence to suggest that influenza B might be equally as dangerous.

Influenza A and B are the most common types of flu in humans. Here, learn about the differences between influenza A and B, ... Share on Pinterest by Alfian Widiantono/Getty Images.

Two types of influenza viruses are responsible for seasonal flu outbreaks: Influenza A and B. Influenza A accounts for around 75 percent of all cases and tends to cause more severe illness in adults.

(Image credit: Image courtesy of the Wilson, Carragher and Potter labs) Flu virus proteins self-replicate Influenza virus proteins in the act of self-replication, captured with a microscope.

Avian influenza, or the bird flu, is an extremely infectious respiratory disease that affects all domestic poultry, including laying hens, broilers, and turkeys, as well as waterfowl and game ...

The flu is spreading far and wide across the U.S. – and influenza A is largely to blame. Skip to content. FOX 4 Kansas City WDAF-TV | News, Weather, Sports.

“Influenza B can be severe as well, but influenza A is the dominant version of influenza infecting people right now.” The flu season feels worse than normal this year. Is it?

They subtyped 593 of the influenza A viruses, finding that 274 or 46.2% of them were were influenza A(H1N1)pdm09, 317 or 53.5% were A(H3N2), and 2 or 0.3% were A(H5).

Influenza activity is elevated across most of the country, with at least 5.3 million illnesses, 63,000 hospitalizations, and 2,700 deaths from flu so far this season, according to the CDC.

Captured in 2013, this negative stained transmission electron microscopic image captured some of the ultrastructural details exhibited by the influenza A virus.