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The Future of Smallpox Vaccination: is MVA the key?
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Correspondence: Mark K Slifka slifkam@ohsu.edu
Medical Immunology 2005, 4:2 doi:10.1186/1476-9433-4-2
Correspondence: Mark K Slifka slifkam@ohsu.edu
Medical Immunology 2005, 4:2 doi:10.1186/1476-9433-4-2