Posted: November 10th, 2016

Why did former President Ronald Reagan call the Salk polio vaccine one of the three greatest inventions of the twentieth century ?

Why did former President Ronald Reagan call the Salk polio vaccine one of the three greatest inventions of the twentieth century ? What were some of the costs and consequences of the prevalence of polio in the first half of the twentieth century? If a vaccine for polio had not been invented, do you believe American childhoods today would be different? If so, in what ways?