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| | Texas Department of State Health Services, Public Health Preparedness, History (Site not responding. Last check: 2007-11-04) |
 | | However, in the 17 th century, the existing lack of knowledge about how disease was transmitted, coupled with the lack of knowledge about how to direct a disease so that it only affected the enemy, made the use of disease as a weapon seem improbable. |
 | | In 1925, the United States was one of the nations that signed the Geneva Protocol, prohibiting the use of chemical or biological agents. |
 | | As the leaders of Unit 731 saw Japan heading for defeat, they burned their records, destroyed their facilities, and fled to Tokyo. |
| www.dshs.state.tx.us /preparedness/bioterrorism/public/history (5650 words) |
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