books.google.com - In 1918, medical science was at a loss to explain the Spanish flu epidemic, which swept the world in three great waves and killed an estimated 20 to 40 million people in just one year, more than the number that died during the four years of World War I. Today, while the Spanish flu has faded in the public's...http://books.google.com/books/about/Hunting_the_1918_flu.html?id=HPDI_30wRsEC&utm_source=gb-gplus-shareHunting the 1918 flu
