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.
Genes of the human Parainfluenza virus fusion (F) and hemagglutinin-neuraminidase (HN) proteins; gene of the human Respiratory syncitial virus fusion protein (RSV F).