A little over a year ago, Marcela Uhart was walking on the ... "We've gone from this concept of dead birds don't fly to this ...

That's the way one scientist puts it — referring to how infected wild birds survive long enough to spread it to birds and mammals around the... It's like 'dead birds flying': How bird flu is ...

A little over a year ago ... dead birds don't fly to this new virus that seems to be a bit more like dead bird flying," explains Erik Karlsson, head of the Virology Unit at the Institut Pasteur ...

UHART: It was just, like, birds flying, you know ... and they contact another group of birds. They fly a little bit further, and that eventually gets all the way across the world.