The study involves two GMOs. ChAdOx1-HPV is a recombinant replication-incompetent chimpanzee-derived adenovirus (ChAdY25) viral vector. MVA-HPV is a modified vaccinia virus Ankara vector (MVA). Both vectors encode a fusion of sequences derived from HPV.
Recombinant Vesicular Stomatitis Virus (rVSV) in which the gene encoding for the VSV glycoprotein G has been deleted and replaced with the gene encoding the Zaire Ebola virus (ZEBOV) glycoprotein (GP).