Battling #InfectiousDiseases in the #20thCentury: The Impact of #Vaccines
The number of infected people, measured over 70-some years and across all 50 states and the District of Columbia, generally declined after vaccines were introduced.
The heat maps show number of cases per 100,000 people.
https://graphics.wsj.com/infectious-diseases-and-vaccines/
https://archive.ph/fTcGF
