
From 35 to 79: The public-health overhaul that extended Americans’ lifespans
U.S. life expectancy has roughly doubled since 1776, rising from about 35–40 years to about 79 years today, thanks to reductions in infant and childhood mortality and major advances in sanitation, clean water, vaccines, antibiotics, nutrition, and chronic-disease prevention; the COVID-19 pandemic caused a temporary dip, but ongoing challenges like obesity and substance use help explain why the U.S. still trails other high-income nations.













