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Smallpox was a highly contagious and deadly disease caused by the variola virus.  On average, 3 out of every 10 people infected died. The origin of smallpox is unknown.  Smallpox was declared eradicated worldwide in 1980.    The virus exists today only in laboratories located in the U.S. and Russia. 

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Smallpox was a highly contagious and deadly disease caused by the variola virus.  On average, 3 out of every 10 people infected died. The origin of smallpox is unknown.  Smallpox was declared eradicated worldwide in 1980.    The virus exists today only in laboratories located in the U.S. and Russia. 

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Smallpox is acquired through inhalation of droplets or skin crusts. The virus can also spread by contaminated items such as bedding or clothing.

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There is an incubation period of 7 to 19 days that an individual is not contagious and feels fine.  Symptoms usually appear 10 to 14 days after      infection. 

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Symptoms include high fever, severe malaise, headache and backache.  Followed by a rash that appears in the pharynx, spreading to the face, and progresses to the extremities.

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Symptoms include high fever, severe malaise, headache and backache.  Followed by a rash that appears in the pharynx, spreading to the face, and progresses to the extremities.

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Treatment for smallpox would focus on relieving symptoms and keeping one from dehydration.  No cure exists.

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Treatment for smallpox would focus on relieving symptoms and keeping one from dehydration.  No cure exists.

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If given the smallpox vaccine within four days of exposure to the virus, it can prevent or lessen the severity of the disease.

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Smallpox can be prevented by smallpox vaccines.  The vaccines contain a live virus called vaccinia.

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Smallpox can be prevented by smallpox vaccines.  The vaccines contain a live virus called vaccinia.

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Edward Jenner developed the smallpox vaccine in 1796.

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Edward Jenner developed the smallpox vaccine in 1796.

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Jenner inoculated a young boy with cowpox that demonstrated immunity to smallpox.

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Because the disease has been eradicated the side effects of the vaccine are too high to justify routine vaccination for people at low risk of exposure.

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Any person not vaccinated is susceptible to the virus.

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Any person not vaccinated is susceptible to the virus.