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The pathological lesions in vaccine-immunized mice following the H37Rv challenge. (A) Global scanning of H&E staining in mouse lungs infected by H37Rv strain. (B) Pathological changes in the lungs of mice infected with the H37Rv strain. Scale bars, 200 μm. (C) The percentage of the lung area occupied by inflammatory cells. All data were shown as means ± SD, n = 3–6. **p < 0.01.
