Before AIDS or Ebola, there was the Spanish Flu ― Catharine Arnold's gripping narrative, Pandemic 1918, marks the 100th anniversary of an epidemic that altered world history. In January 1918, as World War I raged on, a new and terrifying virus began to spread across the globe. In three successive waves, from 1918 to 1919, influenza killed more than 50 million people. German soldiers termed it Blitzkatarrh, British soldiers referred to it as Flanders...