• For the first time in history, we can track the evolution of a pandemic in real-time... Influenza viruses are notorious for their rapid mutation and unpredictable behaviour.

    Margaret Chan: For the first time in history, we can track the evolution of a pandemic in real-time... Influenza viruses are notorious for their rapid mutation and unpredictable behaviour.
    "Influenza A(H1N1)". www.who.int. April 29, 2009.