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==History==
==History==
[[Smallpox]] may have been used as a biological weapon in North America in the 18th century.<ref>http://www.bbc.co.uk/history/worldwars/coldwar/pox_weapon_01.shtml</ref>
[[Smallpox]] may have been used as a biological weapon in North America in the 18th century.<ref>http://www.bbc.co.uk/history/worldwars/coldwar/pox_weapon_01.shtml</ref> During [[World War II]] Britain conducted experiments with [[anthrax]] as a biological weapon on Gruinard Island, Scotland.<ref>https://www.youtube.com/watch?v=hsOJRxs_dTI</ref>
==Present and future==
Biological weapons have not been widely used but they remain a potential threat.
==References==
==References==
{{reflist}}
{{reflist}}