A: The main cause of rapid population growth is when there are more births than there are deaths, which is referred to as a natural increase. Other causes of ... Full Answer >
Spanish flu (1918-1919). The influenza pandemic of 1918-1919 killed more people than the World War I, at somewhere between 20 and 40 million people. It has been cited as the most devastating epidemic in recorded world history. Known as Spanish Flu or La Grippe the influenza of 1918-1920 was a global disaster.
A âtouch of the fluâ kills up to 646,000 people worldwide each year, sometimes as many as 56,000 of them in the United States. Since 1918, there have been three flu pandemics. (An epidemic is when an infectious disease spreads rapidly to many people.