Lung tissue histology from BALB/c mice receiving the indicated transfusions of antibody and/or CRP. Mice were euthanized after 90 minutes following antibody and/or CRP injection and lungs were harvested for sectioning and histology analysis. Panels A1 to F1 and A2 to F2 represent lung tissue images taken at original magnification ×20 and ×40, respectively. Representative images of each indicated group are shown. A zoom of indicated square in E2 (lung section from mice treated with 34-1-2s + CRP) is depicted alongside and shows alveolar neutrophil infiltration. Scale bars represent 100 µM in panels A1 to F1 and 50 µM in A2 to F2.