Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation. ...

The unique nature about the influenza virus is its great potential for changes, for mutation. (Margaret Chan)

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Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation.

Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation.

Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation.

Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation.

Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation.

Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation.

Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation.

Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation.

Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation.

Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation.

Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation.

Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation.

Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation.

Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation.

Margaret Chan Quotes: The unique nature about the influenza virus is its great potential for changes, for mutation.