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CFR's Laurie Garrett provides historical context to the outbreak of swine flu in Mexico.
Influenza pandemics, or the threat of them, have set off waves of panic ever since 1918, when 100 million people around the world died from the illness. CFR's Laurie Garrett explains what we know so far about the current outbreak of swine flu in Mexico and offers some historical perspective to host Jacki Lyden.