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Immunity from Smallpox Vaccine Persists for Decades: A Longitudinal Study

Routine smallpox vaccination was discontinued over 30 years ago, following world-wide eradication of the virus. Potential re-emergence of this disease from bioterrorist action has prompted international health care authorities to reassess the level of immunity in current populations. This study found that immunity from smallpox vaccination lasts for decades. Abstract Background The threat of smallpox […]

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