This site requires Javascript to be turned on. Please enable Javascript and reload the page. Scalar's 'additional metadata' features have been disabled on this install. Learn more. Jonas Salk and the Invention of the Polio Vaccine Main Menu A Brief History of Variolation A Brief History of Vaccination Polio Timeline Alvaro Quezada 7828c851ddc470a00b45eb00bde06e8e2aefd52c Jonas Salk and the invention of the Polio Vaccine 1 media/egypt.JPG media/jonas-salk-polio-vaccine.jpg 2020-09-09T11:58:51-07:00 Alvaro Quezada 7828c851ddc470a00b45eb00bde06e8e2aefd52c 37889 13 splash 2020-09-09T16:54:28-07:00 Alvaro Quezada 7828c851ddc470a00b45eb00bde06e8e2aefd52c Contents of this path: 1 media/MichaelUnderwood.JPG 2020-09-09T11:59:13-07:00 Alvaro Quezada 7828c851ddc470a00b45eb00bde06e8e2aefd52c First clinical description 6 plain 2020-09-09T16:39:35-07:00 Alvaro Quezada 7828c851ddc470a00b45eb00bde06e8e2aefd52c