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NK cell activation. (A and B) Flow cytometry of lymphocyte populations harvested from the livers of pups at 7 days postinfection illustrated a significant decrease in the number of activated NK cells present in the RRVVP4-R446G-injected mice compared to that for RRV-injected mice but a similar number compared to that for saline-injected mice. Red quadrants show the percentages of CD69+ cells in the CD49b+ population (2 livers per sample and 3 samples per strain). *, P < 0.05 (n = 3).
