Wageningen Bioveterinary Research (Larissa Consortium)
Humans
hRVFV-4s is a four segments human Rift Valley fever virus vaccine, which derives from a natural clone (Clone 13) that lacks 69% of the gene NSs, a major virulence determinant of the virus. The hRVFV-4s vaccine is further attenuated by splitting the M genome segment into two M-type segments.
The nOPV2 candidate strains include different combinations of 5 distinct modified regions of the Sabin-2 genome, including changes to the RNA sequence in the 5’ untranslated region of polio genome (5’ UTR), the capsid protein coding region (P1), the non-structural protein 2C, and the polymerase 3D. Of these modifications, only the changes to polymerase 3D result in a change in the amino acid sequence. The rest of the modifications aim to stabilize the genetic sequence against reversion in either the 5’ UTR or capsid regions.
