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1Spanish flu

The 1918 influenza pandemic was the most severe pandemic in recent history. It was caused by an H1N1 virus with genes of avian origin. Although there is not universal consensus regarding where the virus originated, it spread worldwide during 1918-1919.
https://www.cdc.gov/flu/pandemic-resources/1918-commemoration/1918-pandemic-history.htm

2Spanish flu

The 1918 influenza pandemic (January 1918 – December 1920; colloquially known as the Spanish flu) was an unusually deadly influenza pandemic, the first of the two pandemics involving H1N1 influenza virus, with the second being the swine flu in 2009. It infected 500 million people around the world, or about 27% of the then world population of between 1.8 and 1.9 billion, including people on …
https://en.wikipedia.org/wiki/1918_flu_pandemic

3Spanish flu

The Influenza Pandemic of 1918 The influenza pandemic of 1918-1919 killed more people than the Great War, known today as World War I (WWI), at somewhere between 20 and 40 million people. It has been cited as the most devastating epidemic in recorded world history.
http://virus.stanford.edu/uda/

4Which disease become a pandemic in 1918?
The 1918 influenza pandemic was the most severe pandemic in recent history. It was caused by an H1N1 virus with genes of avian origin. Although there is not universal consensus regarding where the virus originated, it spread worldwide during 1918-1919.
https://www.cdc.gov/flu/pandemic-resources/1918-pandemic-h1n1.html

5Pandemic

By October 1918, it had spread to become a worldwide pandemic on all continents, and eventually infected about one-third of the world’s population (or ≈500 million persons). Unusually deadly and virulent, it ended nearly as quickly as it began, vanishing completely within 18 months.
https://en.wikipedia.org/wiki/Pandemic

6Which disease become a pandemic in 1918?
In 1918, a flu virus took only a few months to kill three times more people than World War I. Now, a new study suggests exposure during childhood may explain why it was so deadly.
https://www.medicalnewstoday.com/articles/276060

7Which disease become a pandemic in 1918?
“The 1918 H1N1 pandemic is a classic example of a high-impact pandemic,” Mehta says. Better known as “the Spanish Flu,” it was the most severe pandemic in recent history, killing an estimated 50 million people worldwide, and infecting nearly one-third of the world’s population.
https://health.howstuffworks.com/diseases-conditions/infectious/pandemic.htm

8Spanish flu

Influenza pandemic of 1918–19, the most severe influenza outbreak of the 20th century and among the most devastating pandemics in human history. The outbreak was caused by influenza type A subtype H1N1 virus. Learn about the origins, spread, and impact of the influenza pandemic of 1918–19.
https://www.britannica.com/event/influenza-pandemic-of-1918-1919

9Epidemic

An epidemic is an outbreak of contagious disease that has become more severe and less localized. So it may be a fitting time to distinguish those words ( outbreak and epidemic ) used to describe the spread of contagious diseases, whether discussing the Spanish flu of 1918, the bird flu of 2005, the Zika virus , or the coronavirus of today.
https://www.merriam-webster.com/words-at-play/spanish-flu

10Spanish flu

The Spanish flu pandemic of 1918, the deadliest in history, infected an estimated 500 million people worldwide—about one-third of the planet’s population—and killed an estimated 20 million …
https://www.history.com/topics/world-war-i/1918-flu-pandemic

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