The WHO's pandemic levels are based on how widely a novel flu virus is spreading.

世卫组织的大流行分级以新病毒传播的广泛程度为基础。

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The European Union's health commissioner has suggested the virus be renamed "novel flu."

欧洲联盟卫生专员建议该病毒被改名为新的禽流感。

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The European commission is calling it the "novel flu virus", which as a description is accurate but will also become redundant as time passes.

欧盟委员会将这种病毒命名为“新型流感病毒”，虽然描述得很准确，但随着时间的推移这种叫法也难免被淘汰。

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However, many other La Nina events have not seen novel flu strains spread around the world, they caution.

BBC: La Nina 'linked' to flu pandemics

Minnesota is the nation's third-largest pig farming state, and its health experts said Wednesday they would be calling the illness "H1N1 novel flu" going forward.

CNN: Inaccurate 'swine' flu label hurts industry, pork producers say

"In order not to have a negative effect on our industry, especially under this crisis situation, we decided to call it 'novel flu' from now on, " said Androulla Vassiliou, the European commissioner for health.

CNN: Inaccurate 'swine' flu label hurts industry, pork producers say