• Vaccine Name: vP869
• Target Pathogen: Yellow fever virus
• Target Disease: Yellow fever
• Product Name: Yellow Fever vaccine using vaccinia virus expressing YFV prM and E proteins
• Vaccine Ontology ID: VO_0004152
• Type: Recombinant vector vaccine
• Status: Research
• E gene engineering:
  • Type: Recombinant vector construction
  • Description: The vaccinia virus was uses as recombinant vector (Pincus et al., 1992).
  • Detailed Gene Information: Click Here.
• Immunization Route: Intraperitoneal injection (i.p.)

Mouse Response

• Host Strain: Outbred Swiss Mice
• Vaccination Protocol: Groups of 20 3-week-old outbred Swiss mice were immunized by intraperitoneal (i.p.) injection with 10^7 PFU of vaccinia virus (VP869) or 10^6 PFU of YFV-17D, and 3 weeks later sera were collected from selected mice (Pincus et al., 1992).
• Challenge Protocol: One half of the mice in each group were then either reinoculated with the recombinant virus (VP869) or YFV-17D, or challenged by intracranial (i.c.) injection with a 1: 10^5 dilution of brain homogenate prepared from suckling mice infected with the French neurotropic YFV (approximately 100 LD50). Three weeks later, the boosted animals were bled and then challenged with the French neurotropic strain of YFV. Following challenge, mice were observed daily for 3 weeks(Pincus et al., 1992).
• Efficacy: Mice immunized once or twice with VP869 or YFV-17D were protected from French neurotropic virus challenge. Levels of protection achieved by immunization with VP869 were equivalent to those achieved by immunization with YFV-17D (Pincus et al., 1992).