You will be given a definition of a task first, then some input of the task.
Generate an explanation for the given claim using the provided supporting material from the paragraph. Please consider the following points while generating an output. 1) The claim will always have supporting proof in the paragraph, and the paragraph will have a clear point of view supporting the claim. 2) There can be instances where direct correlation to the claim is not available. Make use of the sentences in the paragraph to provide a corresponding output supporting the claim. 3) The explanation should be at least one and at most twelve sentences long.

Paragraph: Poland, Europe's largest poultry producer according to data from Eurostat, has not had an outbreak of bird flu since 2017. Andrzej Danielak, president of Polish Association of Breeders and Poultry Producers, said that three farms might be affected, with up to 350,000 birds at risk in a three kilometer radius. "Veterinary services are implementing virus eradication procedures in this situation," local authorities in Lubartowski county said in a press release issued on Tuesday, adding that the virus was a subtype of highly pathogenic H5N8 bird flu that can also threaten people The authorities said crisis meetings had been held, while footage from private broadcaster Polsat showed police cars blocking a road in the area. Claim: Poland hit by bird flu outbreak on turkey farms.
Output:
Bird flu has been detected in turkeys in eastern Poland, authorities said on Wednesday, and local media reported that the outbreak could require up to 40,000 birds to be slaughtered.