The Spanish Flu Pandemic of 1918 

The Spanish flu, which spread worldwide from 1918 to 1920, remains the deadliest pandemic in history. Emerging in the last year of World War I, it killed tens of millions and spurred major changes in how societies protect public health. The Spanish Flu Pandemic of 1918 explores the causes, the spread, the effects on people's lives, as well as efforts to treat the disease and halt its spread.