PTPRC and infection: We then tested whether CCR2 is necessary for pre-cDC localisation at infection foci by measuring co-localisation between pre-cDC surfaces (eGFP+ MHC-II- CD64- B220-) and IAV-infection foci (M+ NP+) in Clec9aWTCCR2 versus Clec9aΔCCR2 lung slices (Fig. 4E).