As the world mobilizes against the H1N1 flu pandemic, researchers are working to answer pressing questions about the virus ... conference room that shows an image projected from the microscope.

Pictured is a negative stain electron microscope image of the H1N1 Influenza virus that was responsible for the 2009 flu pandemic. Disclaimer: AAAS and EurekAlert! are not responsible for the ...

It's called swine flu because in the past, the people who caught it had direct contact with pigs. That changed several years ago, when a new virus emerged that spread among people who hadn't been ...

A colorized transmission electron micrograph of swine flu virus particles (green) budding from the surface of a cell (pink). Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy ...

In the weeks that followed, the H1N1 'swine flu' virus spread rapidly to countries worldwide, leading the World Health Organization (WHO) on 11 June 2009 to officially declare the first flu ...

So this G4 G4 EA H1N1 flu virus can infect and reproduce in cells ... (Photo by SERGIO FLORES/AFP via Getty Images) So those are the seven “Hmm” characteristics that deserve some further ...

An epidemiologist makes the case that a rush of research to stop a swine flu outbreak led to an accidental lab release of an ...

Annual flu vaccines help protect us against strains of H1N1 viruses ... may not have originated in Spain Image: picture alliance / AP Photo Type C influenza viruses can infect humans and other ...

It appeared to be a mosaic of a wild-bird form of flu, a human type and a strain found in pigs. It was an H1N1 swine influenza. Largely ignored at the time, the Wisconsin virus was a step along ...

The H1N1 swine flu virus appeared in the U.S. in April 2009 and never went away. After sweeping the globe, U.S. H1N1 swine flu cases surged as schools opened in the fall. What is H1N1 swine flu?

Ever been confused by the names for bird flu or Spanish flu H1N1? Type A influenza has 130 known subtypes, but which ones cause the flu in people? Here’s what the numbers mean. Avid virus ...