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Mice (wild type C57/BL6 and interleukin-4 (IL-4−/−) transgenics) were implanted subcutaneously with MC38 tumors and treated with phosphate buffered saline (PBS), vvDD or vvCCL5 as before. (a) Viral persistence (titers in tumor tissue at day 8 after treatment), and (b) CD4+ cell infiltration were determined. PFU, plaque forming unit.
