From the New York Times:

China’s Agriculture Ministry said late today that it would vaccinate all of the nation’s billions of chickens and other poultry against bird flu.

The campaign, disclosed by the official Xinhua News Agency, would be the largest single vaccination effort ever for any species in terms of the number of animals involved, according to the United Nations’ Food and Agriculture Organization in Rome. It will also be logistically complicated; billions of free-range birds will have to be caught.