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Jonas Salk, the man who developed the polio vaccine, refused to patent it in order to keep costs low for patients. http://t.co/XxQE1dQD1N
United States
/ English
| User | @chadsloyer |
| Date Posted | 7/13/2015 1:08 |
| Region | United States |
| Language | English |
| Post Type | Retweet |
| Hashtags | -- |