On the cover: Incorporation of exosomes in the cytoplasm of bone marrow–derived dendritic cells (BMDCs). PKH67 is a green fluorescent dye for general cell membrane labeling. After 24 hours of incubation, the PKH67-labeled exosomes were taken up by BMDC primary culture (red: F-actin; green: PKH67; blue: DAPI; scale bar: 50 μm). Zhang, Y., J. Meng, L. Zhang, S. Ramkrishnan, and S. Roy. 2019. Extracellular vesicles with exosome-like features transfer TLRs between dendritic cells. ImmunoHorizons. 3: 186–193.