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There have been five major influenza pandemics in the last 140 years, with the 1918 flu pandemic being the most severe; this is estimated to have been responsible for the deaths of 50–100 million people. The 2009 swine flu pandemic resulted in under 300,000 deaths and is considered relatively mild.
The pandemic mostly killed young adults. In 1918–1919, 99% of pandemic influenza deaths in the U.S. occurred in people under 65, and nearly half of deaths were in young adults 20 to 40 years old.
This page therefore shows estimates of deaths during seasonal flu epidemics, historical flu pandemics, patterns of flu seasons in different countries, and confirmed cases of flu and flu-like symptoms across the world.
1 kwi 2021 · The 675,000 deaths attributed to the influenza epidemic made up 0.64 percent of the total population, a little more than six in every thousand people. By contrast, the more than 500,000 deaths ...
20 paź 2024 · An influenza virus called influenza type A subtype H1N1 is now known to have been the cause of the extreme mortality of this pandemic, which resulted in an estimated 25 million deaths, though some researchers have projected that it caused as many as 40–50 million deaths.
Although the 1918 influenza virus caused tens of millions of deaths worldwide, the vast majority of those who were infected had a typical self-limited illness indistinguishable from clinical influenza seen today, and they promptly recovered.
1918–1920: Pandemic: In March 1918, 48 soldiers died of "pneumonia" during a, outbreak at Fort Riley, Kansas. The flu traveled unchecked eastward [47] to New England military bases before traveling across the Atlantic Ocean on crowded military ships to Europe amid World War I.
