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Recurrent fever without any other symptoms for more than 7 days, even if the fevers last only a few hours Fever and a chronic medical problem such as heart disease, cancer, lupus, or sickle cell ...
The smallpox came in the mail, in a little piece of 350-year-old human skin. And the surprise discovery is dramatically rewriting the history of one of the most notorious diseases to plague humankind.
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