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CVB4 E2 infection is cytopathic in human thymus. (A and B) Staining of thymocytes with 7-AAD at 1, 5, and 7 days after CVB4 E2 inoculation of FTOC (A) and staining with 7-AAD and Annexin V 7 days after inoculation (B). 
, P < 0.001 versus mock-infected FTOC (n = 3).
