The Influenza A H3N2 virus subclade K represents a change in the basic structure of the influenza virus.

Feeling under the weather? You could have Influenza Type A. Here's the difference between Influenza Type A and Type B.

Of all the pathogens that have plagued humanity, few are as notorious and persistent as influenza. Its Houdini-like ability to regularly slip the shackles of vaccine- or infection-induced immunity, ...

Forbes contributors publish independent expert analyses and insights. Dr. Omer Awan is a practicing physician who covers public health. A new mutated strain of the common flu, Influenza H3N2, subclade ...

Is it flu A or flu B, and how long is it contagious? Here's what to know about the flu virus running rampant in New Jersey, ...

Doctors and scientists say this year's influenza season could be tougher than usual. A new version of the flu virus, called H3N2, is spreading quickly. At the same time, fewer people are getting flu ...

Influenza remains a significant global health burden, causing millions of visits and tens of thousands of deaths in the U.S. annually. The virus evolves constantly through antigenic drift and shift, ...

A study published in the journal Science finds that bird flu viruses can resist fever-like temperatures in mice -- allowing it to replicate more easily.

Blue lines represent statistically supported migration events between countries with line thickness proportional to the Bayes factor. Red circles represent the posterior probability of migration ...