Two years ago, we met together at a time of great uncertainty, as we faced the threat of a global influenza pandemic.

两年前，我们举行会议时，正面临一场全球流感大流行的威胁，局势极不确定。

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Highly pathogenic avian influenza virus (H5N1) is an emerging pathogen with the potential to cause great harm to humans, and there is concern about the potential for a new influenza pandemic.

高致病性禽流感病毒(H5N1)是一种严重危害人类健康的新型治病源，并与新型流感的暴发流行有关。

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Barry is the author of "The Great Influenza, " perhaps the signature history of the devastating 1918 pandemic.

CNN: Scientists dig for lessons from past pandemics