Worldwide flu pandemic strikes. 1918 - 1919. Late in the spring of 1918 the Spanish wire service Agencia Fabra sent cables of an unusual nature to Reuter's news service headquarters in London. " The influenza commonly called "Spanish flu" killed more people than the guns of World War I The Influenza Pandemic of 1918. The influenza pandemic of 1918-1919 killed more people than the Great War, known today as World War I (WWI), at somewhere between 20 and 40 million people. The Influenza Pandemic of 1918. The influenza pandemic of 1918-1919 killed more people than the Great War, known today as World War I (WWI), at somewhere between 20 and 40 million people. Search MSNBC: Advertisement. RESOURCE GUIDE. WHO: Bird flu pandemic is imminent. Governments must act swiftly to prevent outbreak, officials say. Adrees Latif / Reuters However, on Tuesday she downplayed an earlier report about a possible avian flu pandemic The Influenza Pandemic of 1918. The influenza pandemic of 1918-1919 killed more people than the Great War, known today as World War I (WWI), at somewhere between 20 and 40 million people. The Influenza Pandemic of 1918. The influenza pandemic of 1918-1919 killed more people than the Great War, known today as World War I (WWI), at somewhere between 20 and 40 million people.