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By Mayo Clinic staffEven a single confirmed case of smallpox would be considered an international health emergency. Based on symptoms and appearance of the rash, the Centers for Disease Control and Prevention (CDC) or a CDC Laboratory Response Network-designated variola testing laboratory can do definitive testing using a tissue sample taken from one of the lesions on the skin of the infected person.
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- Taub D, et al. Immunity from smallpox vaccine persists for decades: A longitudinal study. The American Journal of Medicine. 2008;121:1058.
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- Varicella disease questions & answers. Centers for Disease Control and Prevention. http://www.cdc.gov/vaccines/vpd-vac/varicella/dis-faqs-gen.htm. Accessed June 18, 2009.