Influenza pandemic of 1918 - Simple English Wikipedia, the free encyclopedia

The Influenza pandemic of 1918 (commonly known as the Spanish flu) lasted for nearly three years, from March 1918 to December 1920.^[1] About 500 million^[1] people were infected across the world, which had at the time a population of 1.80 billion people. The pandemic spread to remote Pacific Islands and the Arctic. It killed 50 million^[2] to 100 million people.^[3] This was three to five percent of the world's population at the time.^[3] It was one of the greatest natural disasters in human history.^[1][4][5][6]

To keep up morale, wartime censors reduced reports of illness and mortality in Germany, Britain (United Kingdom), France, and the United States.^[7][8] Papers could report the epidemic's effects in neutral Spain (such as the grave illness of King Alfonso XIII). This situation created the false impression of Spain being especially hard-hit.^[9] It also resulted in the nickname Spanish flu.^[10]

Often, influenza outbreaks kill young people, or the elderly, or those patients that are already weakened. This was not the case for the 1918 pandemic, which killed mainly healthy young adults. Modern research, using virus taken from the bodies of frozen victims, has concluded that the virus kills through a cytokine storm (overreaction of the body's immune system). The strong immune reactions of young adults ravaged the body. But, the weaker immune systems of children and middle-aged adults caused fewer deaths among those groups.^[11]

There is not enough historical and epidemiological data to show where the pandemic started.^[1] The pandemic may be a cause of the outbreak of encephalitis lethargica in the 1920s.^[12]

Another swine flu pandemic had happened in the 21st century that turned out to be new strain of H1N1. The outbreak began in Mexico and then the United States and to the world.

• 
  Number of deaths in New York City, Berlin, Paris, and London (Museum of Health & Medicine, Washington), c. 1918–1919
• 
  Two American Red Cross nurses demonstrated treatment practices during the influenza pandemic of 1918.
• 
  Albertan farmers wore masks to protect themselves from the flu.
• 
  Policemen wearing masks provided by the American Red Cross in Seattle, 1918
• 
  A street car conductor in Seattle in 1918 refusing to allow passengers aboard who are not wearing masks
• 
  Red Cross workers remove a flu victim in St. Louis, Missouri (1918)
• 
  Influenza ward at Walter Reed Hospital during the Spanish flu pandemic of 1918–1919
• 
  Burying flu victims, North River, Newfoundland and Labrador (1918)
• 
  1919 Tokyo, Japan
• 
  Japanese poster in 1919
• 
  Demonstration at the Red Cross Emergency Ambulance Station in Washington, D.C., during the influenza pandemic of 1918
• 
  Cavalry memorial on the hill Lueg, memory of the Bernese cavalrymen victims of the 1918 flu pandemic; Emmental, Bern, Switzerland