H1N1 swine flu attacks the respiratory system in a more sustained way than the standard seasonal virus, research in animals shows

MIT researchers have explained why two mutations in the H1N1 avian flu virus were critical for viral transmission in humans during the 1918 pandemic

The World Health Organization (WHO) has declared a global flu pandemic after holding an emergency meeting

A sharp increase in swine flu cases in Australia may mean the infection has become a pandemic, the World Health Organization say

Ambulance crews were warned to stay away from one of their Dundee stations after a possible swine flu case was transported to hospital

Ambulance officers are making their own calls on whether to wear super-protective spacesuit-style clothes during the swine flu scare

Emergency services in Cambridgeshire say they are ready for a possible flu pandemic after sharpening their plans in an exercise