Throughout history there have been several thousand different strains of influenza. Each year hundreds are active. Chances are, this year, you will catch one of those strains. You will cough, sneeze, and your body will ache. Without a second thought, you'll take a double dose of green liquid, go to bed, and swear you'll feel better in the morning. Not this time. In 1918 forty million people succumbed to a particular strain of swine flu. It appeared out of nowhere, and just as quickly as it surfa