On the 100th anniversary of the devastating pandemic of 1918, Jeremy Brown, a veteran ER doctor, explores the troubling, terrifying, and complex history of the flu virus in his new book, INFLUENZA. From the origins of the Great Flu that killed millions to questions like whether we're prepared for the next epidemic, Dr. Brown takes an enlightening and unnerving look at a shapeshifting deadly virus that has been around long before people.