Developing Vaccines to Combat the Threat of Bird Flu.

The U.S. poultry industry is facing a new bird flu strain, H5N1, which has caused infections in over 800 poultry flocks and led to the extermination of nearly 60 million chickens and other birds. French animal-health company Ceva Santé Animale produces up to 400 million doses of a vaccine that prevents chickens from contracting bird flu, but none of those doses will be used in the U.S. due to opposition from farmers. The spike in egg prices has sparked debate over whether the U.S. should embrace a poultry vaccination campaign.