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.
Yellow fever breaks out in Philadelphia. The death toll from a yellow fever epidemic in Philadelphia hits 100 on this day in 1793. By the time it ended, 5,000 people were dead. Yellow fever, or American plague as it was known at the time, is a viral disease that begins with fever and muscle pain.