Immunohistochemistry of paraffin embedded sections from the lungs, brain meninges, brain striatum, spleen and liver of the vector-injected mouse M16 (CAR) and a control mouse injected with PBS (PBS) stained against CD8 (αCD8), the CAR (αCAR), CD4 (αCD4), or CD19 (αCD19). Black arrowheads point at infiltrated lymphocytes, red arrowheads at histiocytes, and the yellow line indicates B-lymphocyte rich zones. 