Reemergence of Monkeypox: Prevalence, Diagnostics, and Countermeasures
1United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Maryland; and 2Department of Epidemiology, University of California–Los Angeles School of Public Health, Los Angeles
Human monkeypox is a viral zoonotic disease that occurs mostly in the rain forests of central and western Africa. However, the disease recently emerged in the United States in imported wild rodents from Africa. Monkeypox has a clinical presentation very similar to that of ordinary forms of smallpox, including flulike symptoms, fever, malaise, back pain, headache, and characteristic rash. Given this clinical spectrum, differential diagnosis to rule out smallpox is very important. There are no licensed therapies for human monkeypox; however, the smallpox vaccine can protect against the disease. The discontinuation of general vaccination in the 1980s has given rise to increasing susceptibility to monkeypox virus infection in the human population. This has led to fears that monkeypox virus could be used as a bioterrorism agent. Effective prevention relies on limiting the contact with infected patients or animals and limiting the respiratory exposure to infected patients.
Received 1 June 2005; accepted 13 July 2005; electronically published 11 November 2005.
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The opinions, interpretations, conclusions, and recommendations are those of the authors and are not necessarily endorsed by the US Army.



