China is trying to contain its first outbreak of bird flu in nearly four months.
More than 22-thousand chickens have been slaughtered in an eastern province. Workers have also vaccinated all birds within three miles of an infected farm.
China confirmed on Tuesday that the farm was the scene of the country's first reported outbreak of avian flu since it had declared the disease "stamped out" nearly four months ago.
Officials have called the outbreak an isolated event. They say they suspect it may have originated with waterfowl or migrating birds.
Thailand and Vietnam have also reported new outbreaks of the severe strain of avian flu virus that earlier this year jumped to people in the two countries and killed 24.