Between 1920 and 2020, the average human life span doubled. How did we do it? Science mattered — but so did activism. Coronavirus Risks and Safety Concerns, Epidemics, Smallpox, Antibiotics, Disease Rates, Vaccination and Immunization, Influenza Epidemic (1918-19), Longevity, Population, Milk, Infant Mortality, Statistics, Cholera
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