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Description:1917
• [Illustration of a male and female with the number 54 under the female icon and 48 under the male icon]
• United States enters World War I. U.S. life expectancy is 54 years of age for women and 48 years of age for men.
1918
• [Illustration of a male and female and an arrow pointing down, with the number 42 under the female icon and 36 under the male icon]
• Spring and fall waves of influenza (”flu”) activity cause the average life expectancy in the United States to fall by 12 years.
1919
• [Illustration of a globe and arrows circling the globe]
• Third wave of pandemic flu activity occurs. Pandemic subsides, but virus (H1N1) continues to circulate seasonally for 38 years.
1930
• [Illustration of a test tube]
• First isolation of influenza, proving that flu is caused by a virus not a bacterium.
1957
• [Illustration of an influenza virus]
• H2N2 flu virus emerges to trigger a pandemic, replacing the 1918 H1N1 pandemic virus.
1960
• [Illustration of a flu vaccine syringe]
• The U.S. Public Health Service recommends annual flu vaccination for people at high risk of serious flu complications.
1968
• H3N2 flu virus emerges to trigger a pandemic, replacing H2N2 virus.
2005
• [Illustration of a DNA strand]
• Genome of the 1918 pandemic flu virus is fully sequenced.
2009
• [Illustration of three people in a circle with arrows points from person to person]
• H1N1 viruses distantly related to the 1918 virus emerge to trigger a pandemic.
pandemic-flu-milestone-infographic.pdf
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