Vietnam: H5N1 kills "vaccinated" chickens

Via AsiaOne.com: Mystery of 'vaccinated' chickens dying of bird flu. Excerpt: Chickens that are vaccinated against bird flu are supposed to be immune to the disease. But hundreds of chickens at a poultry farm in southern Vietnam have died of avian influenza - even though the farm owner had earlier reported that the birds were vaccinated against the disease, an official said yesterday. Since late last month, several hundreds of the 3,000 chickens in the flock have died at the farm in Tan Lan commune in Long An province, 50 km west of Ho Chi Minh City. Last week, they were tested positive for the H5N1 avian-influenza virus, said Mr Dinh Van The, head of the province's Animal Health Department. The farm owner reported to the department that all birds in the farm had been vaccinated against bird flu, he said. "We suspect that he... [read full story]