Assertion: smallpox's virus | /r/AtLocation | the bloodstream
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Source sentences:
text: In the initial growth phase, the virus seemed to move from cell to cell, but by around the 12th day, lysis of many infected cells occurred and the virus was found in the bloodstream in large numbers, a condition known as viremia, which resulted in a second wave of multiplication in the spleen, bone marrow, and lymph nodes.