CXADR and neoplasm: Due to the high similarity (≈90% in protein sequence) of human (NM_001338.5) and mouse (NM_001025192.3) coxsackievirus and adenovirus receptor (CXADR) (Figure S6, Supporting Information), Ads led to a similar infectivity to 4T1 and MDA‐MB‐231 cells via CXADR‐mediated cellular uptake [23] (Figure S7, Supporting Information), and a similar replication rate and cytotoxicity in the two tumor cells (Figures S3 and S5, Supporting Information), regardless of species.