ERVW-1 and cancer: In support, a Melanoma‐Associated RetroVirus virus‐like vaccine in which adenoviruses encoding the Melanoma‐Associated RetroVirus virus‐like proteins Gag and Env drive in vivo assembly of virus‐like particles displaying the cancer‐associated Melanoma‐Associated RetroVirus virus‐like Env protected against colorectal cancer growth and progression (Table 4) (Neukirch et al. 2019).