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.
In fact, pneumococcal disease kills more people in the United States each year than all other vaccine-preventable diseases combined. An estimated 28,000 cases and 2,900 deaths from invasive pneumococcal diseases (IPD-bacteremia and -meningitis) occurred in the United States in 2014.