F5 and neoplasm: As shown in Figure 6A, Gao et al. successfully designed a virus‐mimicking fusogenic vesicle (Vir‐FV) for rapid detection of miRNAs in tumor exosomes employing genetic engineering.[15] The researchers first constructed a cell membrane in which HN and F proteins were coexpressed and then loaded with molecular markers of exosomal miRNAs to obtain Vir‐FV.