CCR2−/− BMT mice recruit fewer fibrocytes in response to γ-herpesvirus infection. Control C57Bl/6, WT BMT, or CCR2−/− BMT mice (n = 4–5 mice per group) were infected i.n. with 5 × 103 pfu γHV-68. At 7 dpi, cells were harvested from collagenase-digested lungs and stained with indicated antibodies and analyzed via flow cytometry. A: total numbers of CD45+,Col I+ cells. B: CD45+,Col I+,MHCII+ cells. Average number of cells per lung is shown ± SE. Statistical significance was calculated by ANOVA, *P < 0.05 (n = 3–4 mice per group).