mrna-5671 mrna-5671 mrna-5671 also known as v941 is a cancer vaccine candidate developed by moderna. it is a tetravalent vaccine that targets g12d, g12v, g13d or g12c driver mutations in the kras gene. it is currently being evaluated for the treatment of either non-small cell lung cancer, colorectal cancers with microsatellite instability, or pancreatic adenocarcinoma, all with confirmed kras driver mutations. mrna-5671vaccine descriptiontargetcancer driven by g12d, g12v, g13d or g12c mutation in the kras genevaccine typemrnaclinical dataroutes ofadministrationintramuscularatc codel03ax17 (who)