Researchers are attempting to develop a vaccine to protect against bird flu. Still, they know that any vaccine would not be ready until a pandemic had already begun.

研究者努力开发一种保护人们不被禽流感感染的疫苗。不过，他们清楚在大流行开始之前没有任何疫苗可以造好。

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By vaccinating eggs against influenza, we could protect wild bird species as well as domestic chickens against pandemic flu strains, limiting the spread of disease to humans.

通过给未孵化的卵接种预防流感病毒，我们可以预防野生鸟类和家养禽类感染流感病毒株，从而限制疾病播散至人类。

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