Vietnam halts bird flu vaccination due to new type The Vietnamese government said it had halted the nationwide vaccination of poultry against bird flu, saying a new type of the H5N1 virus had rendered the vaccine ineffective. [News Source]

Vietnam warns vaccines ineffective vs new type of bird flu The Vietnamese government said it had halted the nationwide vaccination of poultry against bird flu, saying a new type of the H5N1 virus had rendered the vaccine ineffective. [News Source]

Vietnam halts bird flu vaccination due to new type HANOI (Reuters) - The Vietnamese government said it had halted the nationwide vaccination of poultry against bird flu, saying a new type of the H5N1 virus had rendered the vaccine ineffective. [News Source]

Vietnam halts bird flu vaccination due to new type HANOI (Reuters) - The Vietnamese government said it had halted the nationwide vaccination of poultry against bird flu, saying a new type of the H5N1 virus had rendered the vaccine ineffective. [News Source]