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.
Genetic modifications of the nOPV2 vaccine candidates aimed at stabilizing the genetic sequence against reversion compared to the Sabin-2 strain, nOPV2 candidate 1 (S2/cre5/S15domV/rec1/hifi3), nOPV2 candidate 2 (S2/S15domV/CpG40)