The number of flu deaths caused by this lethal influenza strain is staggering, 50-100 million!! This Influenza took an unbelievable toll on human life. The National Academies of Science awarded John M. Barry the Keck award for his intriguing book on the subject. There was no influenza vaccine in 1918, but the collaborative and herculean efforts by the scientific community were life changing to the world of medicine in the US. This is a truly great read, and a great time of year to read The Story of the Deadliest Pandemic in History.