Fabrication of CELVEC. (A) Confocal microscope images of untreated murine macrophages (CTRL) and DOX@CELVEC depicting DiI surface membrane staining (green), DOX loading (red), and DAPI nucleus staining (blue). (B) Scanning and transmission electron microscope images of CTRL macrophages and (C) CELVEC. Scanning electron images shown on left, transmission electron images shown on right. Scale bars, 5 μm.