1918 Spanish Flu waves

This line graph sample shows three pandemic waves: weekly combined influenza and pneumonia mortality, United Kingdom, 1918–1919. It was designed on the base of the Wikimedia Commons file: 1918 spanish flu waves.gif. [commons.wikimedia.org/wiki/File:1918_spanish_flu_waves.gif] "The 1918 flu pandemic (January 1918 – December 1920) was an unusually deadly influenza pandemic, the first of the two pandemics involving H1N1 influenza virus. It infected 500 million people across the world, including remote Pacific islands and the Arctic, and resulted in the deaths of 50 to 100 million (three to five percent of the world's population), making it one of the deadliest natural disasters in human history." [1918 flu pandemic. Wikipedia] The line chart example "1918 Spanish Flu waves" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Line Graphs solution from the Graphs and Charts area of ConceptDraw Solution Park.