In March of 2020, life in the United States, and the world, was changed by the COVID virus.
COVID was a global worldwide pandemic that was everywhere! Note that some people do not like overly repetitive and redundant phrases said over and over in the same way.
A century earlier, the Spanish Flu had taken a large toll on the population of the United States (over 500,000 dead of a population of just over 100,000,000, 1 in 200) and the world (50,000,000 dead in 18 months).
In just over four years of fighting in World War I, about 10 million soldiers died fighting. In 18 months at the end of the war, about 60 million people died from the Spanish Influenza, or Spanish flu, due to the underlying virus.
Something is said to go viral if it spreads quickly (as in the Spanish flu).
Note: These notes were written before COVID-19 in 2020. More people may be familiar with the spread of COVID-19 than the Spanish flu.