Characterization of the lymphocyte subsets in the BAL fluid of mock-infected mice and mice 7 days after intranasal HSV-1 infection. The number of lymphocytes was calculated from the percentage determined by fluorescence-activated cell sorter (FACS) analysis. Data represent means ± SE of individual or pooled BAL samples, derived from at least two separate experiments. Numbers of mock-infected mice were: 12 (normal CBA), 12 (allogeneic GVHD), and 6 (allogeneic No GVHD). Numbers of infected mice were: 17 (normal CBA), 13 (allogeneic GVHD), and 8 (allogeneic No GVHD). The asterisks indicate a significant difference from both normal CBA and allogeneic No GVHD (P < .02; Student's t-test).