The Worst Epidemics Throughout History

Vaccination Distribution

The Salk vaccine was created in 1954 by a researcher at the University of Pittsburgh. The polio cases in the US steadily declined as the vaccine became more and more available to the general public. In 1979, it is believed that the last polio case in the US was diagnosed. It is not eradicated worldwide yet, so the pandemic lives on in other countries for the time being. 

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The More You Know

  • Glaciers and ice sheets hold about 69 percent of the world's freshwater.
  • The youngest parents in the world were aged 8 and 9.
  • Benjamin Franklin was inducted into the International Swimming Hall of Fame.
  • The tongue is the only muscle in the body attached from one end.
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