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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
April 1, 2024
338146
29294
1

apr 26, 1954 - The Salk vaccine was tested on 1.8 million schoolchildren.

Added to timeline:

26 Nov 2017
1
0
378
polio

Date:

apr 26, 1954
Now
~ 69 years ago
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