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 ...

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

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?

The flu virus is lingering in Arizona and the season has been vicious. Pediatric flu deaths reached the highest level in ...

Swine flu is still active in South Africa every winter, and very dangerous for the elderly, children, and people with HIV.

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 ...

Influenza virologists around the world had for years been using freezers to store influenza virus strains, including some that had gone extinct in the wild. Fears of a new H1N1 swine flu pandemic ...

A major new UK study warns that evolving swine flu viruses in Europe could pose a serious future pandemic threat if left ...

The detected virus belongs to a known subtype of influenza A that regularly infects pigs, called H1N2, but it's a newly identified strain. Sporadically, swine flu viruses like H1N2 can jump into ...

Head of primary care and public health at Imperial College London, Professor Azeem Majeed, said the symptoms of swine flu “will be similar to those of other flu viruses”. He said ...

All four flu pandemics — in 1918, 1957 and 1968 and the swine flu pandemic of 2009 — were caused by Type A viruses. Influenza B viruses, however, only circulate in humans. They are divided ...