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| node: | Battling Infectious Diseases in the 20th Century: The Impact of Vaccines |
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| created: | 04.03.2015 - 08:06:59 |
| updated: | 04.03.2015 - 08:07:20 |
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Battling Infectious Diseases in the 20th Century: The Impact of Vaccines
The number of infected people, measured over 70-some years and across all 50 states and the District of Columbia, generally declined after vaccines were introduced.
http://graphics.wsj.com/infectious-diseases-and-vaccines/
The number of infected people, measured over 70-some years and across all 50 states and the District of Columbia, generally declined after vaccines were introduced.
http://graphics.wsj.com/infectious-diseases-and-vaccines/