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Increased IgE levels in LP-BM5-infected mice. The plasma IgE level in uninfected and infected mice was measured at 2 and 5 weeks after viral infection. Mouse infection and the methods used for determination of IgE levels are described in Materials and Methods. Values represent the means ± SDs for 5 animals. *, P < 0.05 versus uninfected mice at the same time point.
