Smallpox is a contagious disease caused by a virus. Smallpox virus has been eradicated worldwide through successful vaccination and treatment programs, and now exists only as a stored virus in a few research centers. Symptoms include a severe rash...
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Update Date:
April 13, 2009
Daniel Levy, MD, PhD, Infectious Diseases, Greater Baltimore Medical Center, Baltimore, MD. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.