Life expectancy by year from 1900 to 2000 in the US had the following changes.
From 1900 to 1920 life expectancy went from 47 to 54.
From 1918 to 1921 life expectancy went from 39 to 60
WW1 and Spanish flu had a lot of youthful deaths that drove down the average age of death in 1918. But the trend was actually going from 47 to 60.
There were far fewer children dying before the age of five and there was reduced disease impacts from improving sanitation and the introduction of the first vaccines.
About 400 million people (mostly Japan, Spain, Italy) have life expectancy over 83 or 84.
Today, Asian Americans live the longest (87.1 years), followed by Latinos (83.3 years), whites (78.9 years), Native Americans (76.9 years), and African Americans (75.4 years).
People can now afford genetic screening to know if they need to modify their lifestyle or get medical treatment because of life-shortening genetic vulnerability.
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