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immunization
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immunization
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vaccine
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The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.
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immunization: References & Edit History

Article Contributors

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Article History

Type Description Contributor Date
Media added. Sep 16, 2024
Top Questions updated. Dec 09, 2020
Invalidated site: National Library of Medicine - Immunization. Nov 22, 2017
Add new Web site: World Health Organisation - Immunization. Sep 21, 2011
Media added. Jun 08, 2009
Added new Web site: How Stuff Works - Healthguide - Immunizations In-Depth. Oct 01, 2008
Added new Web site: How Stuff Works - Healthguide - Immunizations. Oct 01, 2008
Added new Web site: The Nemours Foundation - For Teens - Immunizations. May 09, 2008
Added new Web site: Worldcolleges.info - Immunisation. May 02, 2008
Article revised. Nov 22, 2000
Article added to new online database. Jul 20, 1998
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