(CNN) The spread of the novel coronavirus has resulted in events being postponed or canceled across the country -- everything from the NBA and concerts to universities and schools has been affected. It might be enough to make people wonder: Is all this necessary? The answer is yes. Just look at Philadelphia in 1918, and the spread of the flu. How the Spanish flu hit PhiladelphiaIn September 1918, Philadelphia held a planned Liberty Loan Parade to promote the government bonds that were being issued to pay for World War I.

Source: CNN March 15, 2020 10:06 UTC