About every 50 years, the world is exposed to a pandemic form of the flu virus - a virus which has evolved into something much more serious than seasonal influenza. Past pandemics were lethal to healthy, young people as well as the old and infirm. Explore how one of our tiniest enemies can evolve from benign germ to killer. Learn the difference between seasonal, bird and pandemic flu. Understand what you can do to protect your family from all types of flu viruses.
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