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In the United States, routine smallpox vaccination ended in 1972. The level of immunity remaining in the U.S. population is uncertain, but is generally assumed to be quite low. Smallpox is a deadly and infectious pathogen with a fatality rate of 30 percent. If smallpox were successfully deployed as an agent of bioterrorism today, the public health and economic consequences could be devastating. Toward a Containment... more...