Brazil began a 28-day bird flu observation period on Thursday which it hopes will show the country's chicken farms are free ...

As bird flu sweeps across US poultry and cattle farms, researchers are racing to find ways to contain the outbreaks before ...

The first medical trial in Britain of a vaccine against the bird flu virus H5N1 has begun in Oxford. This is an experimental vaccine against a virus with deadly potential. To see how well it works the ...

The first major global review of bird flu in cats reveals an emerging threat of a potential human pandemic. Spring is here, ...

Preliminary tests indicate a commercial chicken farm in Brazil's state of Tocantins is free from bird flu, the state's farm ...

In 1918, a strain of influenza known as Spanish flu caused a global pandemic, spreading rapidly and killing indiscriminately.

Health officials are making a renewed call for vigilance against bird flu, but some experts are puzzling over why reports of ...

How dangerous is it? Where did it come from? H5N1 influenza’s origins stretch back to the 1990s, and key events paved the way ...

Brazil's poultry industry is reeling from the country's first bird flu outbreak on a commercial farm, but officials hope ...

Mexico, Chile and Uruguay have halted poultry imports from Brazil after the country confirmed its first bird flu outbreak on a commercial farm. The decision came Saturday. On Friday, Brazil’s ...

Brazil, one of the world’s largest producers and exporters of poultry, has confirmed the country’s first bird flu outbreak on ...

The idea is biologically plausible and historically grounded — and it reframes how we think about the origin of pandemics.