Bird Flu > Bird Flu News > Bird influenza viruses have a variety of strategies to cross the species barrier (News-Medical-Net)

Bird influenza viruses have a variety of strategies to cross the species barrier (News-Medical-Net)
The 2009 H1N1 influenza virus used a new strategy to cross from birds into humans, a warning that it has more than one trick up its sleeve to jump the species barrier and become virulent.