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Is smallpox contagious before the symptoms show?

April 26, 2017contagious smallpox symptoms

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Is smallpox contagious before the symptoms show?

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A person with smallpox is sometimes contagious with onset of fever, but the person becomes most contagious with the onset of rash. The infected person spreads the disease into the air by breathing and from the scabs. Infected persons are contagious until the last smallpox scab falls off.