"For the first time, we may be able to explain why pregnant women are more likely to get swine flu, why some healthy people get severe swine flu and others don't," Professor Grayson said.
格雷森称，“对于孕妇为什么更容易得猪流感以及为什么有些健康的人患病时会更严重而有些人却只是小病一场，这些问题我们首次有了可信的解释。”同时，它也解开了为什么疫苗对于有些人没有作用的谜团。
We can get some idea of its magnitude from the Spanish flu pandemic in 1918, which killed between 20 and 50 million people.
1918年的西班牙流感大流行造成2000万至5000万人死亡，这可使我们对禽流感的规模有一定的了解。
Up to half the people who get swine flu never develop a fever, and some suffer from gastrointestinal.
有多达一半的猪流感患者并不发烧，而有些人除了常规的流感症状还出现了胃肠症状。
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