The Spanish Flu Pandemic, also known as the Great Influenza Pandemic, the 1918 Flu Epidemic, and La Grippe, was an unusually severe and deadly strain of influenza, a viral infectious disease, that killed some 50 million to 100 million people world-wide in 1918 and 1919. It is thought to have been the most deadly pandemic so far in human history, killing more people than the Black Plague or AIDS.
And: ep·i·dem·ic ( P ) Pronunciation Key (p-dmk) also ep·i·dem·i·cal (--kl) adj. Spreading rapidly and extensively by infection and affecting many individuals in an area or a population at the same time: an epidemic outbreak of influenza. Widely prevalent: epidemic discontent. n. An outbreak of a contagious disease that spreads rapidly and widely. A rapid spread, growth, or development: an unemployment epidemic.
pan·dem·ic ( P ) Pronunciation Key (pn-dmk) adj. Widespread; general. Medicine. Epidemic over a wide geographic area and affecting a large proportion of the population: pandemic influenza.