In 1918, the Spanish flu left over 50 million people dead. It was the worst pandemic in recent history. Recent research confirmed it was an avian flu. Today H5N1, otherwise known as Bird Flu, is threatening the human race, mutating in similar ways to the Spanish flu at breakneck speed. H5N1 has claimed human lives in South Asia and has been detected in Europe, Africa and the Middle East. It could become an airborne contagion at any time. This comprehensive one-hour special tracks the mutation of the virus since 1997, and follows a mother and daughter down a hypothetical timeline to discover a frightening global pandemic scenario if it does become airborne. Can the human race outrun and outsmart a microscopic killer that may just be an evolutionary tick away from causing massive fatalities? Will we be prepared to do so? 1. Communicable diseases 2. Animal-human relationships 3. Vaccination 4. Bird flu Pandemic influenza - Avian virus - H5N1