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)
Only notified under the "contained use" procedure. Dossier submitted on 05/07/2005.